Glenn Corbett, an expert in fire protection, is an Associate Professor of Fire Science at John Jay College of Criminal Justice in New York City. Corbett served on the federal advisory committee to the National Construction Safety Team that investigated the collapse of the World Trade Center towers and testified before the 9/11 Commission. He serves as technical editor of Fire Engineering magazine.
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After the jets hit, stairwells became the sole means of escape for thousands of WTC occupants. But design choices hampered full evacuation—and made the descent even more harrowing.
Read more about How the Design of the World Trade Center Claimed Lives on 9/11