简介：Thoughterroriststriggered(触发)thecollapse(倒塌)oftheWorldTradeCenter'sTwinTowers,muchoftheenergy--calculatedbyaphysicisttohavebeenatleast2percentthatoftheatomicbombdroppedonHiroshima(广岛)--wassuppliedbynature'smostubiquitous(普通存在的)force:gravity.
Gravity Helped Terrorists Destory Twin Towers
