2,999

Number of victims killed at the World Trade Center, the Pentagon and on the four fatal flights.

2,629

Number of people killed at New York’s World Trade Center, including 341 New York firefighters, two of the city’s paramedics and 23 of its police officers.

125

Number of people killed at the Pentagon.

87

Number of victims on American Airlines Flight 11, the first plane to hit the World Trade Center.

59

Number of victims on United Airlines Flight 175, the second plane to hit the World Trade Center.

59

Number of victims on American Airlines Flight 77, which hit the Pentagon.

40

Number of victims on United Airlines Flight 93, which crashed in rural Pennsylvania.

19

Number of hijackers on the four planes.

17

Minutes between the first plane hitting the north tower of the World Trade Center (8:46 a.m.) and the second plane hitting the south tower (9:03 a.m.).

24

Minutes between the collapse of the south tower (10:05 a.m.)and the north tower (10:29 a.m.).

57

Minutes between the first World Trade Center attack (8:46 a.m.) and the Pentagon attack (9:43 a.m.).

2,000

Estimated temperature of the fire in the World Trade Center

towers, in degrees Fahrenheit.

1,000

Tons of exploding TNT, comparable to the force with which the airliners hit the World Trade Center towers.

586

Estimated speed at which United Airlines Flight 175 hit the south tower, in miles per hour.

494

Estimated speed at which American Airlines Flight 11 hit the north tower, in miles per hour.

5,000

Units of blood collected by the New York Blood Center within 12 hours of the attacks.

1,800,000

Numbers of tons of debris moved from the World Trade Center site in New York.

2,000

Estimated number of children who lost a parent in the attacks.

150

Amount, in millions of dollars, raised during the celebrity-hosted “America: A Tribute to Heroes” telethon on Sept. 21.