A look back at September 11, 2001 attack.
September 11, 2001 Attacks
As America reflects on the September 11 attacks of 2001, here are some of the iconic images from that tragic day.
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Firefighers work on the roof of the Pentagon after a hijacked aircraft crashed into it.
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Thousands of candles are lit in Tallinn, Estonia to commemorate the tens of thousands of victims of the deportation march when, from March 25-28, 1949, more than 22,000 people in Estonia alone were forced from their homes and deported east, many to never return.
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Investigators head into the debris field at the site of a commercial plane crash near Shanksville, Pennsylvania. The crash is one of four planes that were hijacked as part of a deadly and destructive terrorist plot.
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An American flag flies near the base of the destroyed World Trade Center in New York.