Even at the margins,the collisions were devastating: the wingtip of the second plane grazed the 78th floor sky lobby in the south tower,instantly killing dozens of people waiting for elevators.

• 就连大楼的边边角角也遭到了彻底的破坏。第二架飞机的翼尖擦过了南楼78层，正在等电梯的几十人当即死亡。