Sept. 11 facts and figures

The beginning: Construction of the World Trade Center took six years and eight months, from 1966 to 1973.

The end: One hour, 42 minutes passed from the first impact of the planes to the second collapse of the twin towers.

What it cost us: The estimated fiscal damage to the U.S. economy from the attacks through 2003 is $640 billion.

What it cost them: The documented expenses of the 19 hijackers to train and carry out the attacks total less than $304,000.

Locked up: Camp Delta Detention center at Guantanamo Bay, Cuba, currently houses 564 "combatants" captured in Afghanistan.

Impact: The magnitude of the earthquake-like tremor caused by the impact of American Airlines Flight 11 striking the north tower was 0.9. The tremor caused by the north tower's collapse was 2.3, measured from 21 miles away.

Helping Hand: About $2.7 billion in charitable donations have been made to help Sept. 11 victims and their families. About $1.5 billion had been distributed by summer with another $768 million earmarked for assistance through 2002.

Getting tough: The United States will have spent about $44 billion through fiscal year 2003 for anti-terrorism defense efforts, including Afghanistan and related operations.

Wealthy finds: Crews recovered more than 379,000 ounces of gold from the Bank of Nova Scotia at the World Trade Center site. Current value is about $118.5 million. Crews also recovered three statues by Auguste Rodin.

Left behind: Crews found 144 rings, 437 watches, 77 necklaces, 119 earrings, 80 bracelets and four autographed baseballs among the 65,000 personal items recovered in New York.

Victims of Sept. 11: The total death toll from the attacks on the World Trade Center, Pentagon and the Pennsylvania crash is 3.043, not including the 19 hijackers.

Paying tribute: An estimated 3.6 million tourists are expected to visit Ground Zero in New York by the end of this year.

HeroesThe number of police and firefighters killed in New York totaled 403. Then-Mayor Rudolph Giuliani had to promote 168 New York firefighters the day after the attacks to replace slain fire department commanders.

Red, White and Blue: On Sept. 11, 2000, Wal-Mart sold 6,400 American flags. A year later, on the day of the attacks, the store chain sold 116,000.