The numbers of 9/11

The toll343: New York City firefighters killed; 60 were off duty.

60: Police officers killed.

8: Private emergency medical technicians, paramedics killed.

10: Bystanders killed by debris.

2,996: Died at ground zero, at the Pentagon and Flight 93 in Shanksville, Pa.

4: Number of planes that crashed that day.

19: Number of hijackers.

0: People who escaped the North Tower from above the floors where the plane hit.

18: Survivors found in the rubble: 12 firefighters, three police officers, three civilians.

Ground zero6 years, 8 months: Time it took to build the World Trade Center, from 1966 to 1973.

1 hour, 42 minutes: Time it took to destroy the towers, from the first impact to the second collapse.

180 miles per hour: Speed at which a Boeing 707 could hit the towers but not destroy them, under the engineering plan.

0.9: Magnitude of the quake-like tremor caused by the impact of American Airlines Flight 11 hitting the North Tower.

2.3: Magnitude of the tremor caused by the collapse of the North Tower from 21 miles away.

92: Bomb threats phoned in to police in New York City on 9/11.

Compensation$7 billion: Payout of government compensation; the average was $1.8 million. Compensation started at $250,000 for relatives of those who earned up to $20,000 per year. Payments for victims in the highest salary bracket -- $220,000 or more -- were higher; some received as much as $7.1 million.

National reaction116,000: U.S. flags sold by Wal-Mart on Sept. 11, 2001.

4 million to 5 million: Estimated number of tourists expected to visit the National Sept. 11 memorial next year.

The wars6,026: Number of troops killed in Iraq and Afghan wars (4,442 in Iraq and 1,584 in Afghanistan).

90: Minnesotans killed in wars (68 in Iraq and 22 in Afghanistan).

$1.283 trillion: Cost of the wars, according to Congress.

$3.2 and $4 trillion: Cost of the wars, including medical care and disability for veterans, said the Eisenhower Research Project.