how long did 9/11 take to clean up

The key events of the September 11, 2001 attacks unfolded over the course of approximately three hours on the morning of the attack. The attacks started around 8:46 a.m. with the first plane crashing into the North Tower of the World Trade Center, and the final crash occurred at 10:03 a.m. when Flight 93 crashed in Pennsylvania after passengers intervened. The South Tower collapsed at 9:59 a.m., about 56 minutes after being hit, and the North Tower collapsed at 10:28 a.m., approximately 1 hour and 42 minutes after impact. Thus, the main series of attacks and immediate consequences lasted roughly from 8:46 a.m. to about 10:30 a.m..