An enlarged view of the twin towers.

Smoke billowed from the Pentagon after the attack.

8: 46: 26 am: American Airlines flight 1 1 (a Boeing 767 full of fuel) crashed into the North Building of the World Trade Center at a speed of about 490 miles per hour, between the 94th and 98th floors of the North Building. The building immediately caught fire, and the fuel on the plane poured into the building, which aggravated the fire and destroyed the whole building structure. People under the hit floor began to evacuate. But all three stairs were damaged, so people who were hit above the floor could not escape. The staff of the South Building of the World Trade Center quickly informed all the staff of the South Building that the South Building was "still safe" and could operate normally. Some people ignored the radio announcement and still evacuated, some people continued to work, and some people gathered in the air lobby on the 78 th and 44 th floors of the South Building.

9:02:54 am: United Airlines 175 (another Boeing 767 full of fuel) crashed into the 78th and 84th floors of the South Building of the World Trade Center at a speed of about 590 miles per hour. The plane crashed into the south tower at a left-leaning angle of nearly 45 degrees, indicating that the hijackers almost missed the target. Part of the wreckage of the plane flew out from the east and north sides of the building and fell six blocks away. However, there are still 1 stairs intact, and a few people above the impact point can still survive. Someone heard many explosions. Some people think that these are two unrelated accidents, while more people immediately think that this is a terrorist attack.

8:46 am to 10:29 am: at least 20 people trapped by fire and smoke (mainly in the north building) fell from the sky at the top floor of the building. There is evidence that a large area in the middle of the North Building collapsed immediately after the attack. Maybe this is to make these people think that the building will collapse soon and jump off the building to survive. The fireman on the first floor was killed by a jumper who fell from the sky. Due to the strong smoke and updraft, air rescue activities cannot be carried out, and new york itself lacks special helicopters for air rescue.

At about 9: 04am, the FAA Boston Air Traffic Control Center issued an order to suspend the take-off of all aircraft in its jurisdiction (New England and eastern new york).

9: 06 a.m: FAA prohibits any aircraft from entering the airspace of new york and nearby Boston, Cleveland and Washington.

9: 08 am: FAA prohibits all planes flying to or passing through new york airspace.

Photos of the attack on the World Trade Center in New Jersey (the Twin Towers have collapsed)

At 9: 24 am, US President Bush, who was visiting a primary school classroom in Florida, received the news that a second plane had hit the World Trade Center. Immediately after class, he made a short speech in another classroom of the school, calling the incident a "national tragedy".

9: 24 a.m.: The FAA informs the Northeast Air Defense Department of NORAD that American Airlines Flight 77 has been hijacked. The FAA contacted NORAD to discuss issues related to American Airlines Flight 77 and United Airlines Flight 93.

9: 26 am: FAA announces that all domestic civil aviation flights are prohibited from taking off.

9: 37 am: American Airlines Flight 77 (Boeing 757) crashed into the west wing of the Pentagon and caused a fire. The attacked part has just been renovated and not fully put into use, but it still caused more than 0/00 deaths in the west wing of the Pentagon/KLOC.

9:45 am: The United States closes its airspace and prohibits any civil aviation flights from taking off. All flights in flight must land at the nearest airport immediately. All flights to the United States will be diverted to Canada immediately. After that, the FAA announced that the flight ban would last at least until the afternoon of September 12. The flight ban finally lasted until September 14, during which only military and rescue aircraft were allowed to take off. This is the fourth time in the history of the United States to stop all commercial flights in the United States, and it is also the only unplanned emergency measure. Prior to this, all planes were grounded for national defense needs.

9:45 am: The White House and Capitol Hill are closed.

9: 50am: The Associated Press reported that American Airlines 1 1 flight was actually hijacked after taking off. Within an hour, the news that American Airlines 1 1 and United Airlines 175 were hijacked was confirmed.

9: 57 am: President Bush leaves Florida.

9:59:04 am: The South Tower of World Trade Center collapsed. Through the live broadcast on TV and radio, hundreds of millions of viewers around the world witnessed the collapse of the building in horror.

10:03 AM: United airlines flight 93 (Boeing 757) crashed in the southeast of shanks, Pennsylvania. According to the police investigation report, no one lives was on board. Further investigation later showed that some passengers had contacted the ground through their mobile phones before the plane crashed, and they had learned that the World Trade Center and the Pentagon had been attacked. After learning that they were about to become suicide bombers, at least three passengers took risks to fight back, trying to regain control of the plane from the hijackers. It is likely that fierce resistance caused the plane to crash before reaching its destination.

Witnesses were also quoted as saying that a white plane similar to a fighter plane hovered over the scene a few minutes after the accident. There are rumors that the US military shot down the plane to prevent it from attacking the intended target, but it was denied by the US military.

10: 10 AM: The Pentagon partially collapsed.

10: 13 early morning: the United Nations headquarters in new york began to evacuate, affecting tens of thousands of people.

10:28:3 1 early morning: the north building of the World Trade Center collapsed from top to bottom, and the floors above the impact point were uninhabited. There are three main reasons why the north building collapsed later than the south building: the impact point is higher, the aircraft speed is slower, and the fire protection system of the affected floors has been partially updated.

Buildings such as Marriott Hotel, US Customs and Hilton Hotel near the Twin Towers were also damaged.

10:35 AM: The police received a report that there was a bomb in a car outside the State Council, but confirmed that there was no accident.

10:39 AM: us president bush issued an order that in an emergency, the air force can shoot down any plane that may attack.

10: 45 AM: CNN reported that Washington and new york have started to evacuate completely. The United Nations Headquarters is empty. A few minutes later, Mayor new york ordered the evacuation.

10:50 AM: Five-story buildings in some areas of the Pentagon collapsed due to fire.

10:53 AM: new york temporarily canceled the mayoral election.

1 1: 16 AM: American Airlines confirmed that two of its planes crashed.

1 1: 17 AM: United confirmed that flight 93 was missing and expressed "great concern" about flight 175.

165438+ 0: 53 am: United confirmed that two of its planes crashed.

165438+ 0: 55 am: The US-Mexico border is on high alert.

At about12: 00pm: President Bush arrives at barksdale Air Force Base in Louisiana. He originally went to Salasuo, Florida to discuss education policy, and should have returned to Washington. He issued a brief informal statement saying that he could not tolerate terrorist attacks in the United States. "Freedom has been attacked, but it will be protected in the end."

12:02 PM: The Taliban regime in Afghanistan issued a statement condemning the attack.

12:04 pm: Los Angeles International Airport is closed.

Afternoon: San Francisco International Airport is closed.

12: 16 PM: Airports in 48 states in the United States stop all commercial and private flights.

65438+ 0:04 p.m.: President Bush declared the US military on high alert at barksdale Air Force Base, and then went to Strategic Air Command (SAC) in Nebraska. Later, many political commentators criticized the president for seemingly wandering aimlessly.

65438+ 0: 27 pm: The District of Columbia declared a state of emergency.

4 pm: The media quoted a senior official of the Federal Intelligence Agency as saying that bin Laden was the most likely person to launch an attack.

4: 25pm: new york Stock Exchange and American Stock Exchange announce that they will be closed on Wednesday, September 12.

5: 20 p.m.: The 47th-floor salomon brothers Building, which was previously reported to have a fire, collapsed. The construction engineer still can't explain the cause of the collapse, and the investigation is currently under way. There is a special new york Emergency Center in the building, which is responsible for dealing with emergencies like 9 1 1. The collapse of the building also slightly damaged the nearby new york Telephone Building and other buildings.

6 pm: CNN and BBC respectively reported a series of explosions and crossfire in Kabul, the capital of Afghanistan. Later reports showed that the Northern Alliance of Afghanistan attacked Kabul airport by helicopter.

6:00 p.m.: The Iraqi government issued an official statement on state-run television, calling the incident retaliation for "American crimes against humanity".

6: 54 pm: Bush finally arrives at the White House.

7: 30pm: The US government denies responsibility for the Kabul bombing.

8:30 pm: President Bush delivers a televised speech to the nation at the White House. In his speech, he said, "terrorist attacks can shake the foundation of our largest building, but they cannot touch the foundation of the United States. These terrorist acts destroyed steel, but they did not weaken America's steely determination at all.

9: 00 pm: Bush met with all members of the National Security Council and met with senior advisers half an hour later. Bush and his colleagues identified Osama bin Laden as the mastermind behind the incident.

Heart is the victim of 9. 1 1!