Watch: US Flag Unfurled Over Pentagon To Mark 9/11

ARLINGTON, VA -- A giant American flag was unfurled over the western side of the Pentagon Tuesday morning, exactly 17 years after American Airlines Flight 77 crashed into the building as part of the Sept. 11, 2001 terror attacks.

Hijackers piloted the aircraft into the Pentagon at 9:37 a.m. that day, killing all 64 people on board and 125 people in the building.

In what has become an annual tradition, giant American flags were also hung from all the skyscrapers in Rosslyn to remember the lives lost on that fateful day. Video of the Pentagon unfurling is below.

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WATCH the U.S. flag being unfurled at the Pentagon marking 17 years since the Sept. 11 attacks. MORE: https://t.co/Gwzp5DzGtE #911 #September11 #Pentagon pic.twitter.com/UTbTiMKJw0
— FOX 5 DC (@fox5dc) September 11, 2018

ARLINGTON, VA - SEPTEMBER 11: An American flag is unfurled down the side of the Pentagon to mark the 17th anniversary of the 9/11 terror attacks September 11, 2018 in Arlington, Virginia. The nation observed 9/11 terror attacks that killed nearly 3000 people on American soil in 2001. (Photo by Alex Wong/Getty Images)