There was an A&E documentary on the World Trade Center the other night, discussing–as well as criticizing–the early planning phases and construction of the WTC.
It also focused somewhat on the shortcomings of the WTC, such as stairwells hugging the core of the building providing what they thought was extra stability, that led to so many civilian casualties during the 2001 attacks.
There was obvious concern over the methods used for high-rise building evacuation. In most cases stairways are used, provided that they are in working condition. The planes that struck the WTC buildings destroyed a large portion of the stairs which in turn contributed to the lack of proper evacuation.
