the Towers took closer to around 15 seconds to collapse «Speed of Fall» 911research.wtc7.net... freefall, low resistance collapse time fell at near the rate of free fall «Speed of Fall» a timeline freefall, low resistance collapse time the Towers' tops fell virtually unimpeded free-fall speeds the Twin Towers collapsed in about 15 seconds 911research.wtc7.net/wtc/analysis/collapses/freefall.html 911research.wtc7.net/wtc/analysis/collapses/freefall.html freefall, low resistance collapse time fell at near the rate of free fall http://911research.wtc7.net/wtc/anal.../freefall.html 911research.wtc7.net... fell at near the rate of free fall nearly free-fall speed, in 10 to 15 seconds BOMBS «Speed of Fall» BOMBS freefall, low resistance collapse time