9/11 is still the cleanest "uncontrolled" demolition (6 buildings using just 2 planes) in human history > the events of september 11, 2001 in new york city were unprecedented. two airliners crashed into the world trade center (wtc) twin towers, resulting in large explosions and fires. the towers collapsed within 2 hours. four buildings or structures collapsed later, and 32 other buildings sustained moderate to major damage. nearly 2,800 people died, including more than 2,200 civilians, 343 firefighters, and 60 police officers. hundreds of thousands of people were exposed to environmental contaminants and witnessed potentially traumatic events. tens of thousands of lower manhattan building occupants, residents, and school children were evacuated and had their lives and livelihoods disrupted for months to years afterward. an estimated 91,000 rescue workers, volunteers, construction contractors, and others arrived to work at or nearby the wtc site on 9/11 or in the days and months thereafter, shifting from rescue to recovery.1 the effort involved city, state, and federal agency employees as well as contracted workers and volunteers from all 50 states. > 2 planes > 6 buildings collapsed > 32 other buildings sustained moderate to heavy damage
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