Unfathomable losses incurred

Here is a look at just some of the horrendous numbers linked to the Sept. 11 terrorist attack on the World Trade Center.

6,000 or more people are presumed dead.

28.7 million sq. ft. of office space was destroyed or damaged in Downtown Manhattan.

13.4 million sq. ft. of office space was completely destroyed as a result of the attack.

133,000 tons of debris and counting have been hauled away.

1,300 businesses in the area were affected by the attack.

31 tenants, occupying 100,000 sq. ft. or more, were displaced by the disaster, according to Insignia/ESG.

4 million sq. ft., the total square footage of each tower at the World Trade Center.

110 stories, the height of each tower, or 1,365 feet.

$3.2 billion, the price tag of the 99-year lease entered into by New York-developer Silverstein Properties Inc. and Los Angeles-based REIT Westfield America. The lease included the World Trade Center's twin towers.

$10 billion in real estate losses as estimated by Jones Lang LaSalle.

75,000 unemployment claims will be filed in New York as a result of the attacks, according to the Labor Department.