USA. New York City. September 11, 2001. Pedestrians on Church Street run from falling debris as Tower 2, the South Tower, of the World Trade Center collapses at 9:55 a.m. Tower 1, the North Tower, still standing here, collapsed at 10:29 a.m. Seven World Trade Center, the 47-story building seen immediately in front of Tower 1, collapsed at 5:25 p.m.