New York City Fire Department Images September 11,2001

A New York City Fire Department GMC Suburban was torched by an explosion following the attacks Sept. 11, 2001, at the World Trade Center.  (FDNY)

New York City Fire Department ladder truck 58 from the South Bronx pours water on a collapsed building in the World Trade Center complex Sept. 11, 2001. A firefighter in the foreground is videotaping the scene.

7 World Trade Center, a trapezoidal building adjacent to the Twin Towers, was effectively destroyed Sept. 11, 2001. Part of the building and an overhead walkway to the World Trade Center plaza, seen here, remain standing immediately following the attack. (FDNY)

An elevated walkway connecting 7 World Trade Center to the World Trade Center plaza remains standing after the Twin Towers' collapse Sept. 11, 2001. A panel created by Mayor Michael Bloomberg to represent those affected by WTC damages estimated that the cost to evaluate and treat those affected or potentially affected by the terrorist attack could exceed $392 million per year. (FDNY)

Chunks of steel, aluminum and concrete, shards of glass and a layer of white ash fill the streets of lower Manhattan around the World Trade Center on Sept. 11, 2001. New York City firefighters assess damage to one of the buildings still standing at the complex. (FDNY)

A New York City Fire Department ladder truck lays upside down, buried beneath collapsed steel and concrete of the World Trade Centers. Two exposed wheels on the truck are missing their rubber tires, which presumably melted away in the heat of the fire after the towers collapsed.