the plan for the future
As on 10 May 2013
Taken from: Si.edu - World Trade Center elevator artifacts
Description: This elevator emergency-instruction plate and four elevator frame floor markers were recovered from the World Trade Center debris.
Context: Elevators were the lifeblood of the World Trade Center. At 110 stories, the 99 elevators in each tower were necessary to quickly move people up from the street and between floors.
For many occupants of the World Trade Center on September 11, deciding whether to use the elevators meant the difference between life and death. When terrorists crashed an airliner into the north tower, the power for many of the elevators was interrupted, and some people became trapped (a few were freed before the building collapsed). In the south tower, numerous people used elevators to evacuate in the 17-minute period before the second crash. After the second crash, most of the 83 elevator mechanics gave up their rescue attempts and evacuated.