Twenty years ago, nearly 3,000 people died due to coordinated attacks against the United States by terrorists who hijacked four passenger jets that crashed into the World Trade Center buildings in New York, the Pentagon, and a field in rural Pennsylvania. Photojournalist Peter Turnley arrived at the site of the World Trade Center — “ground zero” — at about 6:30 p.m. on Tuesday, September 11, 2001. “I pulled up to a police barricade that was turning all cars away and showed my NATO press pass from work in Kosovo,” he said. “The police looked at the pass, shrugged their shoulders, and said hesitantly, ‘go ahead.'” He worked over the next 10 days, documenting the devastation and the courage of first responders and rescue workers, and the grief of families and friends of the dead.

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