Timeline of the September 11 Attacks

Flight 11 communicates with the air traffic controller for the final routine. After 16 seconds the controller ordered the pilot to raise the altitude of the aircraft. However, there is no response and all subsequent messages are not replied. The investigator believes that the aircraft was hijacked during this time.

Flight 11 cabin crew warned American Airlines that the aircraft was hijacked. She reported "Cockpit did not answer" and reported that the hijackers had bombs. In addition, two other cabin attendants and one passenger were stabbed. Passengers are believed to be confirmed later as former Israeli army Daniel Ruwin and are trying to stop hijacking. Some also speculated that he was the first victim of this attack.

Flight 77 of American Airlines left for Los Angeles from Dulles International Airport near Washington DC. The aircraft carried six crew members including five hijackers and 58 passengers. Before arriving on an airplane, when three terrorists passed security guards, they had already exploded metal detectors, but they all passed the follow up survey.

Flight 175 made the last communication with the air traffic controller and reported that he heard "suspicious sending" of another aircraft at takeoff and was later determined as flight 11. About half the time, Flight 175 was hijacked and its transponder code hijacked in about 5 minutes.

United flight 93 departed for San Francisco from Newark International Airport in New Jersey. Seven crew members, 37 passengers, 4 of them are hijackers. At this time, we did not notify the aircraft that the aircraft 11 was hijacked.

The second flight attendant on eleventh flight contacted the aircraft official on the phone and reported that the aircraft is in a "steepest descent" state and the aircraft is "too low flying". Then the phone suddenly ends

A Flight 175 cabin crew called the United Airlines to inform the staff that the aircraft was hijacked and that both pilots had died. During this time passengers were also called friends and family members. The passenger's phone will provide important information on hijacking in the subsequent survey.

Dulles' air traffic controller observed the aircraft "fast". Two minutes later, officials at Ronald Reagan Washington National Airport reminded Secret Service about the plane going to the White House (decided later Flight 77)

After the vote, passengers in flight 93 hurried to the cockpit trying to regain the aircraft. The hijackers rolled the plane to the left and right (and later up and down), but the passengers continued to beat the door of the cockpit

The hijackers decided to "knock down" and began to steep descent so that passengers could be seen as having approached the cockpit door with flight 93. In the meantime, the plane turned over. The subsequent record made some people believe passengers entered the cockpit and succeeded in struggling with the controller

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There is no way to measure the impact of the September 11, 2001 attack. Of course it is impossible to predict how these attacks (and their countermeasures) will be executed after 25 years. However, September 11 is definitely a unique day in the history of the country, and its effect is unique and disturbing. These extraordinary events have constantly urged contemporary people to explore their causes, consequences and meanings. September 11th happens at once (and in place) and offers rare opportunities as there are many ways to know and record it. No such country has ever witnessed such an incident when such an incident occurred.