Assisting the Rescue Surveying the Damage Assessing Buildings Navigating the PATH Understanding the Site Stabilizing the Wall Removing Debris Supporting Structures Extracting Hazards Uncovering Property
Sources
World Trade Center 7
DAVE PERAZA: After being structurally damaged by falling debris and burning unchecked for about eight hours, this 47-story building (which had housed the Mayor's emergency command center) collapsed in the early evening of September 11.
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Image credits: LZA/Thornton Tomassetti