USA. New York City. September 11, 2001. As pedestrians watch from Church Street, Tower 2 of the World Trade Center, the South Tower, 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.