Final answer:
The search for survivors at the World Trade Center and the Pentagon after the September 11, 2001 attacks lasted several months, involving firemen, cops, and many volunteers.
Step-by-step explanation:
The search for survivors at the World Trade Center and the Pentagon after the September 11 attacks was a monumental effort involving firemen, cops, construction workers, and other volunteers. This search and cleanup effort at the World Trade Center site in New York, known as Ground Zero, lasted for several months after the initial tragedy. Rescue efforts were extensive and proceeded around the clock in the immediate aftermath, with responders digging through the smoldering debris in the hope of finding survivors. However, as time went on, the operations transitioned from rescue to recovery, with the focus shifting to recovering the remains of those lost in the attacks and clearing the site.