"19 hijackers, directed by Osama B Laden, took over 4 Commercial Jets with box cutters and, while evading the Air Defense System (NORAD). Hit 75% of their targets. In turn, W. Trade Towers 1,2 & 7 collapsed due to structural failure through fire in a "pancake" fashion, while the plane that hit the Pentagon vaporized upon impact, as did the plane that crashed in Shanksville. The 911 Commission found that there were no warnings for this act of Terrorism, while multiple government failures prevented adequate defense".