New York, NY, September 21, 2001--Rescue operations continue far into the night at the World Trade Center.

"You're dealing with a work scene that, in the first week or two, had probably two to three thousand, if not more, emergency responders on the scene. Pretty much 24 hours a day. All of them with various backgrounds and training. You had construction workers, you had heavy-equipment operators, you had medical workers, firefighters, police officers, hygienists, military personnel. All of them with different levels of training, different types of equipment. So you had to try and logistically bring in all of the equipment for these people. You're bringing in multiple manufacturers and vendors."

--Firefighter-special-operations panel member