11, 2001 file photo, White House chief of staff Andrew Card whispers into the ear of President George W. The crash severs all three emergency stairwells, trapping hundreds of people above the 91st floor.Ĩ:46 a.m.: Police, paramedics and firefighters are sent to the North Tower. Hundreds, including everyone on board the flight, are killed instantly. The flight is filled with 48,700 pounds of fuel.Ĩ:46 a.m.: Five hijackers crash Flight 11 into floors 93 through 99 of the North Tower of the World Trade Center. Seven crew members, 33 passengers and four hijackers are on board. The flight was due to take off at roughly the same time as the other hijacked planes, but was delayed due to routine traffic. The conference is one of many events on the Trade Center schedule that day.Ĩ:37 a.m.: The Boston Air Traffic Control Center alerts the military that a hijacking is under way.Ĩ:42 a.m.: United Airlines Flight 93 takes off from Newark International Airport. The hijacker was attempting to communicate with passengers and crew within the cabin.Ĩ:30 a.m.: Around this time, roughly 80 people have already begun gathering on the 106th floor of the North Tower of the World Trade Center for a financial technology conference. This device is meant to allow air traffic controllers to identify and monitor the flight path of a plane.Ĩ:24 a.m.: One of the hijackers of Flight 11 unwittingly broadcasts a message to air traffic controllers alerting them to the attacks. The flight has 49,900 pounds of fuel and is carrying six crew members, 53 passengers and five hijackers.Ĩ:21 a.m.: The transponder on Flight 11 is turned off. (AP Photo/APTN)Ĩ:20 a.m.: American Airlines Flight 77 takes off from Washington Dulles International Airport. 11, 2001, just hours before American Airlines Flight 77 crashed into the Pentagon in this image taken from a surveillance video and obtained by the Associated Press. Hijacker Khalid al-Mihdhar, wearing the yellow shirt, foreground, passes through the security checkpoint at Dulles International Airport in Chantilly, Va., Sept. Lewin is likely the first person killed in the 9/11 attacks. Lewin, who was sitting in front of him in first class. In the moments before Ong’s call, one of the hijackers stabbed Daniel M. This call lasts roughly 25 minutes and Ong reports that the cockpit is unreachable. This flight also is loaded with 76,000 pounds of fuel.Ĩ:19 a.m.: American Airlines ground personnel are alerted by flight attendant Betty Ann Ong that Flight 11 is being hijacked. The plane, which will eventually crash into the North tower at the World Trade Center, is filled with more than 76,000 pounds of fuel.Ĩ:15 a.m.: United Airlines Flight 175 takes off from Boston with nine crew members, 51 passengers, and five hijackers on board. for primary elections.ħ:59 a.m.: American Airlines Flight 11 takes off from Boston with 11 crew members, 76 passengers and five hijackers on board. The day was a significant one on the New York City political calendar, as polling stations opened at 6 a.m. ¥ 6:00 a.m: Two of the hijacked planes, American Airlines Flight 11 and United Airlines Flight 175, will eventually crash into the North and South Towers of the World Trade Center complex in New York City. The men will take a short flight to Boston Logan International Airport, where they will join three other hijackers and board American Airlines Flight 11. As the world commemorates the 20th anniversary of 9/11, the following timeline, courtesy of the National September 11 Memorial & Museum, can help people fully understand how events unfolded on that late-summer morning two decades ago.ĥ:45 a.m.: Two of the hijackers pass through security at Portland International Airport in Maine. September 11 would become an infamous date in American and world history, and the events of that day would forever change the world. The planes departed from airports in Boston Newark, NJ and Washington, D.C. On the morning of September 11, 2001, 19 terrorists hijacked four commercial airplanes bound for California.