!! History Commons Alert, Exciting News

Profile: Washington Air Route Traffic Control Center

Washington Air Route Traffic Control Center was a participant or observer in the following events:

After the second World Trade Center crash at 9:03 a.m., air traffic controllers at the FAA’s New York Center are told by their supervisors to watch for airplanes whose speed indicates that they are jets, but which either are not responding to commands or have disabled their transponders. Controllers in Washington receive a similar briefing, which will help them pick out hijacked planes more quickly. [New York Times, 9/13/2001] Whether controllers at other FAA air traffic control centers receive similar instructions at this time is unclear, but those at its Indianapolis Center, which is handling Flight 77, are apparently not informed by their supervisors of the unfolding crisis. [9/11 Commission, 6/17/2004; Spencer, 2008, pp. 105-107]

Entity Tags: Indianapolis Air Route Traffic Control Center, New York Air Route Traffic Control Center, Washington Air Route Traffic Control Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Controllers at the FAA’s Washington Center.Controllers at the FAA’s Washington Center. [Source: FAA]The three F-16 fighter jets launched from Langley Air Force Base (see (9:25 a.m.-9:30 a.m.) September 11, 2001) that have been directed toward Washington request and are given permission to fly at high altitude over the city. After the Langley AFB pilots are given the correct coordinates they are to head to (see (Between 9:41 a.m. and 9:50 a.m.) September 11, 2001), at 9:51 lead pilot Major Dean Eckmann looks on his radar screen and sees that the area where he has been directed to set up a combat air patrol is filled with air traffic. He therefore contacts the FAA’s Washington Center and tells the controller, “I need 3,000 feet of altitude in a 20-mile ring around DC.” When the controller asks the reason, Eckmann replies, “Higher headquarters’ request!” The controller gives him an altitude range of 25,000 to 27,000 feet. Eckmann radios the other two Langley pilots and gives them their altitude assignments: he’ll fly at 25,000 feet, Major Brad Derrig will be at 26,000 feet, and Captain Craig Borgstrom at 27,000 feet. According to author Lynn Spencer, the jets then head toward Washington at 700 miles per hour, just under the speed of sound. [Spencer, 2008, pp. 180-182] However, Spencer’s account of this incident conflicts with the 1st Air Force’s book about the 9/11 attacks. According to that account, several minutes before Eckmann reportedly asks for altitude clearance—at around 9:45 a.m.—he had been directed to drop to lower altitude to check out two unidentified aircraft, and was then told to inspect the Pentagon (see (9:45 a.m.) September 11, 2001). [Filson, 2003, pp. 66]

Entity Tags: Dean Eckmann, Craig Borgstrom, Washington Air Route Traffic Control Center, Brad Derrig

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

An air traffic controller at the FAA’s Cleveland Center enters a new flight plan for Flight 93 into the FAA computer system, giving a new destination of Reagan National Airport in Washington, DC. Flight 93 is currently flying in the airspace covered by the Cleveland Center’s Imperial Sector radar position, which is being managed by controller Linda Justice. [Federal Aviation Administration, 9/11/2001; St. Petersburg Times, 9/12/2001; 9/11 Commission, 10/2/2003 pdf file; Lynn Spencer, 2008]
Controller Enters New Flight Plan for Flight 93 - Justice changes the flight’s destination code from “SFO,” the code for San Francisco International Airport, to “DCA,” the code for Ronald Reagan Washington National Airport. [St. Petersburg Times, 9/12/2001] An FAA chronology will specify that she changes the flight plan “direct HGR [the code for Hagerstown Regional Airport in Maryland] to DCA.” [Federal Aviation Administration, 9/11/2001] Another FAA chronology will similarly state that Justice reroutes Flight 93 “direct to Hagerstown direct to Washington National.” [Federal Aviation Administration, 12/6/2001] Flight 93’s tag therefore now reads, “Hagerstown—National,” according to Justice. [9/11 Commission, 10/2/2003 pdf file]
New Flight Plan Not Due to Communication with Pilot - The reason Justice enters a new flight plan for Flight 93 is unclear. A minute earlier, the hijacker pilot on Flight 93 reprogrammed the plane’s navigational system for the new destination of Reagan Airport (see 9:55 a.m. September 11, 2001). [Longman, 2002, pp. 182; 9/11 Commission, 7/24/2004, pp. 457] And according to the St. Petersburg Times, controllers typically only change a plane’s destination when this is requested by the pilots. [St. Petersburg Times, 9/12/2001] But one of the FAA chronologies will state that Justice’s change to the flight plan is “not a result of any communication with the pilot.” [Federal Aviation Administration, 9/11/2001]
Flight Plan Changed to Aid Handoff to Washington Controllers - Justice will later explain why she changes the flight plan. She will state that Flight 93 appears to be heading toward the airspace of the FAA’s Washington Center, and so, in “an attempt to expedite the situation,” she enters the change of routing to reflect Hagerstown Airport to Reagan Airport. She will say she does this “only to forward [the] information [about Flight 93] to the sectors the aircraft appeared to be tracking toward.” [Federal Aviation Administration, 9/12/2001 pdf file] Justice will tell the 9/11 Commission that she changes the routing when she sees Flight 93 is heading eastbound. She will say, “The easiest way to do a handoff is to change the flight plan,” and also say she changes the flight plan “to show that Washington Center was the recipient.” According to Justice, the “controversial step” she takes is “putting in Hagerstown, because the misconception was that she had communicated with the plane and cleared it through.” [9/11 Commission, 10/2/2003 pdf file] John Werth, another controller at the Cleveland Center, will tell the 9/11 Commission that Justice enters the new destination for Flight 93 “because she knew it would be easier to track the primary [radar track for the aircraft] when the computer has a flight plan to work with.” [9/11 Commission, 10/1/2003 pdf file] After changing the flight plan, Justice calls the Potomac Sector radar position at the Washington Center and tells the controller there to “pull up the data block” for Flight 93. Justice will say it is clear to the Washington Center controller that she has created the new destination in order to make it easier to locate the plane. [Federal Aviation Administration, 9/12/2001 pdf file; 9/11 Commission, 10/2/2003 pdf file]
New Flight Plan Causes False Reports of Plane Approaching Washington - According to author Lynn Spencer, the new flight plan creates a “coast track” of Flight 93 on the traffic situation displays at air traffic control facilities. “A coast track,” Spencer will write, “differs from a radar track in that it is not supported by radar returns but rather by a computer-generated, projected course for the flight. Although this track did not appear on controller radar screens, its presence on their [traffic situation displays] allowed Washington controllers to monitor the flight’s progression toward Washington.” According to Spencer, the presence of this coast track leads to incorrect reports of an aircraft approaching Washington in the minutes after Flight 93 crashes. She will write, “A controller in Washington, unaware that the flight had crashed, was calling position reports for the coast track of United 93 to the White House (see (Between 10:10 a.m. and 10:18 a.m.) September 11, 2001)… as well as the FBI at the Pentagon (where firefighters were evacuated and the firefight suspended in anticipation of a second impact)” (see (10:15 a.m.-10:38 a.m.) September 11, 2001). [Lynn Spencer, 2008]

Entity Tags: John Werth, Linda Justice, Cleveland Air Route Traffic Control Center, Washington Air Route Traffic Control Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The pilots that took off from Langley Air Force Base (see (9:25 a.m.-9:30 a.m.) September 11, 2001) hear a warning over radio that errant aircraft will be shot down, and receive an instruction from the Secret Service to protect the White House. [Spencer, 2008, pp. 222-223]
Pilots Learn of FAA Order - The three Langley fighter jets have now reached the Baltimore-Washington area. [Spencer, 2008, pp. 222] The pilots hear over their radios that the FAA has ordered all civilian aircraft to land. [New York Times, 10/16/2001] (The FAA issued this instruction at around 9:45 a.m. (see (9:45 a.m.) September 11, 2001). [US Congress. House. Committee On Transportation And Infrastructure, 9/21/2001; 9/11 Commission, 7/24/2004, pp. 29] )
Borgstrom Hears Shootdown Warning - The three pilots are all on different radio frequencies, but are able to communicate between themselves on their auxiliary frequency. According to author Lynn Spencer, one of them, Captain Craig Borgstrom, hears a message over the emergency radio frequency that is in response to the FAA’s recent order: “Attention all aircraft! Attention all aircraft! You are ordered to land at the nearest suitable airport. All aircraft must land immediately. Violators will be shot down.” The source of this message is unstated. [Filson, 2003, pp. 66; Spencer, 2008, pp. 222-223] (Author Leslie Filson will describe the Langley pilots hearing what is apparently a separate but similar message later on, some time after 10:42 a.m. (see 10:05 a.m.-11:05 a.m. September 11, 2001). [Filson, 2003, pp. 82] )
Instructed to Protect the White House - Around the time Borgstrom hears this, Major Dean Eckmann, the lead Langley pilot, is on the radio with the FAA’s Washington Center. A Secret Service agent has arrived there and wants to talk to him. [Filson, 2003, pp. 68; Spencer, 2008, pp. 222-223] Eckmann then receives a garbled message over his radio, which is difficult to make out. [New York Times, 11/15/2001] The message is, “Protect the house.” Eckmann will later recall, “I took it to mean protect the White House.” [Filson, 2003, pp. 68] He notifies the two other pilots—Borgstrom and Major Brad Derrig—of this message. He tells them, “I think I just talked to the Secret Service, but I’m not sure.” [New York Times, 11/15/2001]
Possible Shootdown Order? - According to Spencer, this message means that “Unknown to NEADS” (NORAD’s Northeast Air Defense Sector), Eckmann has been “given shootdown authority directly from the Secret Service, bypassing the military chain of command.” [Spencer, 2008, pp. 223] But Borgstrom and Derrig will later say they “never received explicit orders to fire on incoming planes perceived to be hostile.” [New York Times, 11/15/2001] Borgstrom radios NEADS weapons director Steve Citino and asks for specific instructions about what to do (see 10:07 a.m. September 11, 2001). [Spencer, 2008, pp. 223] According to the 9/11 Commission, NEADS will only learn that NORAD has been given clearance to shoot down threatening aircraft at 10:31 a.m., and even then it does not pass this order along to the fighter pilots under its command (see 10:31 a.m. September 11, 2001). [9/11 Commission, 7/24/2004, pp. 42-43]

Entity Tags: Brad Derrig, Washington Air Route Traffic Control Center, Craig Borgstrom, Dean Eckmann, US Secret Service

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Weapons load crew members from the District of Columbia Air National Guard arming an F-16 on September 11.Weapons load crew members from the District of Columbia Air National Guard arming an F-16 on September 11. [Source: Corensa Brooks / District of Columbia Air National Guard] (click image to enlarge)Two District of Columbia Air National Guard (DCANG) fighter jets take off from Andrews Air Force Base, near Washington, to defend the capital, the first DCANG planes to launch armed with missiles as well as bullets. [Aviation Week and Space Technology, 9/9/2002; 9/11 Commission, 2004; 9/11 Commission, 2/17/2004; 9/11 Commission, 3/11/2004 pdf file] The two F-16s are piloted by Captain Brandon Rasmussen and Major Daniel Caine. [Aviation Week and Space Technology, 9/9/2002] Although Caine was his unit’s supervisor of flying (SOF) this morning, he decided earlier on that he was going to get airborne, and so Lieutenant Colonel Phil Thompson has taken his place as SOF (see (Shortly After 9:35 a.m.) September 11, 2001). [Filson, 2003, pp. 76; Spencer, 2008, pp. 184]
Commander Supposedly Gave Shootdown Authority - As Caine and Rasmussen were passing the SOF area on the way to their fighters, they were quickly briefed by Brigadier General David Wherley, the commander of the DC Air National Guard. Wherley had by then received instructions from the Secret Service for his fighter jets to follow (see (10:15 a.m.) September 11, 2001 and (Between 10:16 a.m. and 10:35 a.m.) September 11, 2001). According to author Lynn Spencer, he told the two pilots: “You need to establish a CAP [combat air patrol] over Washington. Intercept any incoming aircraft 60 miles out and use whatever force necessary to keep it from targeting buildings downtown.” Wherley said, “You will be weapons free,” which means the decision whether to fire on a hostile aircraft rests with the lead pilot, and added, “Just be careful.” [9/11 Commission, 7/24/2004, pp. 44; Spencer, 2008, pp. 238] However, Rasmussen will contradict this account, saying that once he is airborne, “we still haven’t been told, ‘You are clear to engage anybody.’ They just said, ‘Get airborne as quick as you can.’” But while the two pilots were getting suited up ready to fly, Caine, who will be the flight lead, had reassured Rasmussen that he would take responsibility for firing on any hostile planes. He’d said: “Whatever you do, don’t be the first one to shoot.… Let me be the first one to shoot, if it comes to that, and then do what I do.” [Rasmussen, 9/18/2003]
Fighters Loaded with Missiles - Three DCANG jets took off from Andrews earlier on, but none of them were armed with missiles (see (10:38 a.m.) September 11, 2001 and 10:42 a.m. September 11, 2001). [Vogel, 2007, pp. 446] Missiles were loaded onto Caine and Rasmussen’s F-16s while they were sitting in the cockpits. [Aviation Week and Space Technology, 9/9/2002] Rasmussen will later recall that “we were probably 20 to 30 minutes behind” the previous two jets to launch, “because they were loading heat-seeking missiles on the aircraft.… Once they armed us up, we just rolled right down the runway and blasted off.” The jets take off with hot guns and two AIM-9 Sidewinder missiles each. According to Rasmussen, this is the first time he has flown with live missiles. He will say, “I had never flown with real missiles and had never so much as seen them on the jet.”
Communicate with FAA Controllers - After taking off, Caine and Rasmussen communicate with the FAA’s Washington Center, “primarily to control us and give us an idea of the air picture,” according to Rasmussen. The Washington Center normally controls all of the air traffic in the area. However, its controllers are not trained as weapons controllers. Rasmussen will say: “[W]e’re used to working with AWACS [Airborne Warning and Control System] weapons controllers or GCI [ground control intercept].” GCI is “a ground-based radar facility with weapons controllers who will give you the tactical air picture; control and coordinate who is targeting what aircraft; and run the air war that way.” [Filson, 2003, pp. 84; Rasmussen, 9/18/2003]
Airborne for 3-4 Hours - DCANG pilot Marc Sasseville, who took off at 10:42 a.m., was initially the CAP commander, but Caine takes over this responsibility from him once he is in the air. [9/11 Commission, 3/8/2004 pdf file; Vogel, 2007, pp. 446] Caine and Rasmussen will remain airborne for three or four hours, which is at least twice as long as the usual maximum duration for an air-to-ground sortie, of about an hour and a half. [Rasmussen, 9/18/2003]

Entity Tags: 121st Fighter Squadron, Daniel Caine, Washington Air Route Traffic Control Center, District of Columbia Air National Guard, David Wherley, Brandon Rasmussen

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

The plane carrying Attorney General John Ashcroft, which is heading toward Washington, DC, is threatened with being shot down by the military if it does not land, and is diverted to Richmond, Virginia. [Washington Post, 9/28/2001; Federal Aviation Administration, 3/21/2002; Spencer, 2008, pp. 258] Even though the FAA had issued a national ground stop preventing aircraft from taking off (see (9:26 a.m.) September 11, 2001), Ashcroft insisted that his plane take off and fly back to Washington after it landed in Milwaukee to refuel (see After 9:37 a.m. September 11, 2001). And though the FAA has been instructing all aircraft to land at the nearest airport (see (9:45 a.m.) September 11, 2001), Ashcroft told his pilot to ignore an order to land near Detroit, and instead continue toward Washington (see 10:40 a.m. September 11, 2001). [US Congress. House. Committee On Transportation And Infrastructure, 9/21/2001; Ashcroft, 2006, pp. 117; Spencer, 2008, pp. 257-258]
Fighters Intercept Ashcroft's Plane - When Ben Sliney, the national operations manager at the FAA’s Herndon Command Center, hears that Ashcroft’s pilot is refusing to land, he notifies NORAD’s Northeast Air Defense Sector (NEADS). As a result, two F-16 fighter jets from a nearby Air National Guard base intercept Ashcroft’s plane, but they remain out of sight and undetected by its pilot. The F-16s’ pilots report to NEADS that the errant plane is a private corporate jet without any markings, which is heading for Washington and does not seem to have any intention of landing.
Sliney Wants Plane 'out of My Sky' - Ashcroft’s pilot, David Clemmer, has started broadcasting a message “in the blind,” meaning it is not intended for any specific air traffic controller, stating that the attorney general is on the plane and they are returning to Washington. The F-16 pilots notify NEADS of this, but when a NEADS officer then tells Sliney about the message, Sliney asks, “Can you guarantee me that it is indeed John Ashcroft on that plane?” The officer replies, “No sir, we cannot,” and so Sliney demands, “Then get him out of my sky!” NEADS issues the order to the two F-16 pilots that if the plane will not land voluntarily, then they must take it down. The F-16 flight lead calls the FAA’s Washington Center and arranges for one of its controllers to call the plane’s pilot and tell him that if he does not divert and land, his plane will be shot down. [Spencer, 2008, pp. 258]
Pilot Warned Plane Could Be Shot Down - The Washington Center controller tells Clemmer, “Land your plane immediately, or risk getting shot down by the US Air Force.” [Newsweek, 9/24/2001] Clemmer relays this warning to Ashcroft, telling him: “Sir, there’s a shootdown order. If we get any closer to Washington, they might blow us out of the sky.” [Ashcroft, 2006, pp. 118] Clemmer also turns to an FBI agent who has been assigned to guard Ashcroft, and says, “Well, Larry, we’re in deep kimchi here, and basically, all the rules you and I know are out the window.” He tells air traffic controllers that he is carrying the attorney general, but is worried that this information won’t get through to military commanders who control the airspace around Washington. [Newsweek, 9/24/2001] Clemmer will later recall: “We didn’t want to do anything that would jeopardize our safety or the safety of the [attorney general]. I know I didn’t want to get shot down either.”
Plane Diverted to Richmond - According to some accounts, Ashcroft finally relents, and, at the insistence of the FAA, his plane is diverted to Richmond. Ashcroft will later recall, “It was a real negotiation [with the FAA].” [Washington Post, 9/28/2001; Newsweek, 3/10/2003; Spencer, 2008, pp. 258] However, according to a 2002 FAA report, Ashcroft’s plane is diverted to Richmond “due to air traffic requests for the release of medevac aircraft in the Washington, DC, area.” [Federal Aviation Administration, 3/21/2002] As the plane flies toward Richmond, Clemmer negotiates getting a fighter escort for it. Ashcroft will persist in his desire to reach Washington, and his plane will eventually be cleared to land in the capital (see 11:27 a.m. September 11, 2001). [Washington Post, 9/28/2001; Spencer, 2008, pp. 272]

Entity Tags: John Ashcroft, Northeast Air Defense Sector, David Clemmer, Washington Air Route Traffic Control Center, Ben Sliney

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

Logo of the 192nd Fighter Wing.Logo of the 192nd Fighter Wing. [Source: Air National Guard]More fighter jets arrive over Washington, DC. These include F-16s from Richmond, Virginia, and Atlantic City, New Jersey. [Aviation Week and Space Technology, 9/9/2002] The Atlantic City jets belong to the 177th Fighter Wing (see (Shortly After 9:03 a.m.) September 11, 2001), and the Richmond jets belong to the 192nd Fighter Wing. [GlobalSecurity (.org.), 10/21/2001; Code One Magazine, 10/2002] Fighters from Langley Air Force Base in Virginia (see (Between 9:49 a.m. and 11:00 a.m.) September 11, 2001) and Andrews Air Force Base, just outside Washington (see 10:42 a.m. September 11, 2001 and 11:11 a.m. September 11, 2001), are already flying over the capital. Captain Brandon Rasmussen, who took off from Andrews at 11:11 a.m., actually flies out to intercept the fighters from Richmond, apparently not realizing who they are. He will later recall: “I ended up running an intercept out of a two-ship out of Richmond, two-ship F-16 out of Richmond that just came flying north. In essence, we would find whatever we could on the radar, ask [the FAA’s] Washington Center if they knew who it was, and if they didn’t, we would run an intercept on them to visual identify who they were.” [Rasmussen, 9/18/2003] According to Aviation Week and Space Technology magazine, with jets from different units arriving over Washington, “The air picture was confused, at best, and radio frequencies were alive with chatter.” [Aviation Week and Space Technology, 9/9/2002]

Entity Tags: 177th Fighter Wing, Brandon Rasmussen, 192nd Fighter Wing, Washington Air Route Traffic Control Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline

One of the FAA’s Cessna Citation V jet planes.One of the FAA’s Cessna Citation V jet planes. [Source: Unknown]Although it was recently redirected toward Richmond, Virginia, the plane carrying Attorney General John Ashcroft tries again to head to Washington, DC, and a military fighter jet arrives to escort it into the capital. [Washington Post, 9/28/2001; Federal Aviation Administration, 3/21/2002; Ashcroft, 2006, pp. 118] Ashcroft’s plane, a small government Cessna jet, has been trying to return to Washington after an engagement in Milwaukee was aborted due to the terrorist attacks (see Shortly After 9:03 a.m. September 11, 2001). Ashcroft has ignored requests to land, and so his plane has been threatened with being shot down by the military and diverted to Richmond (see 11:11 a.m. September 11, 2001). [Newsweek, 9/24/2001; Newsweek, 3/10/2003; Spencer, 2008, pp. 257-258]
Pilot Persuaded to Head toward Washington - However, Ashcroft still wants to reach Washington. He therefore calls the Justice Department command center for assistance. Then, according to author Lynn Spencer, “With some high-level coordination,” one of the protective agents on Ashcroft’s plane “convinced the pilot to try once again to enter the city.” [Spencer, 2008, pp. 272] The pilot, David Clemmer, negotiates to have fighter jets escort the plane into Washington. [Newsweek, 9/24/2001; Washington Post, 9/28/2001]
Controller Requests Fighter Escort - The FAA’s Washington Center consequently calls the Terminal Radar Approach Control (TRACON) at Washington’s Reagan National Airport. The Washington Center controller says: “Hey, we’ve got November 4 out here. He wants to land at [Reagan Airport]. There’s some concern and they want a fighter escort.” TRACON controller Dan Creedon recognizes the plane’s N-number (specifically, N4) as belonging to one of the FAA’s jet aircraft, and confirms, “Yeah, November 4 is based out of Washington.” He then calls District of Columbia Air National Guard (DCANG) pilot Major Daniel Caine, who recently launched from Andrews Air Force Base to defend Washington (see 11:11 a.m. September 11, 2001), and tells him of the plane requesting a fighter escort. When Caine asks who is on it, Creedon replies: “I don’t know. My assumption is FAA-1 or DOT-1,” meaning FAA Administrator Jane Garvey or Transportation Secretary Norman Mineta.
DCANG Pilot Gets Langley Jets to Provide Escort - Caine says the jets launched from Langley Air Force Base (see (9:25 a.m.-9:30 a.m.) September 11, 2001) that are defending Washington (see (Between 9:49 a.m. and 11:00 a.m.) September 11, 2001) will handle this. He forwards Creedon’s request to Major Dean Eckmann, the lead pilot from Langley. Eckmann responds that the inbound plane “can have one” of his fighters. He then directs his wingman, Major Brad Derrig, to intercept it. [9/11 Commission, 12/1/2003; 9/11 Commission, 12/1/2003; Spencer, 2008, pp. 272-273] While Ashcroft’s plane is waiting for Derrig’s fighter to arrive, it is put in a holding pattern outside of Washington. [9/11 Commission, 12/17/2003 pdf file] Ashcroft’s plane will be escorted to Reagan Airport, but the time it lands at is unclear (see (12:00 p.m.) September 11, 2001). [Newsweek, 9/24/2001; Federal Aviation Administration, 3/21/2002; USA Today, 8/13/2002; Vogel, 2007, pp. 453]

Entity Tags: John Ashcroft, Dean Eckmann, Brad Derrig, Daniel Caine, Ronald Reagan Washington National Airport, US Department of Justice, Dan Creedon, David Clemmer, Washington Air Route Traffic Control Center

Timeline Tags: Complete 911 Timeline, 9/11 Timeline


Time period

Email Updates

Receive weekly email updates summarizing what contributors have added to the History Commons database


Developing and maintaining this site is very labor intensive. If you find it useful, please give us a hand and donate what you can.
Donate Now


If you would like to help us with this effort, please contact us. We need help with programming (Java, JDO, mysql, and xml), design, networking, and publicity. If you want to contribute information to this site, click the register link at the top of the page, and start contributing.
Contact Us

Creative Commons License Except where otherwise noted, the textual content of each timeline is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike