Watch live: Pentagon marks 23 years since 9/11 attacks

ARLINGTON, VIRGINIA, UNITED STATES - 2023/09/11: An American flag hangs from the side of the Pentagon to commemorate the 22nd anniversary of the 9/11 attacks. The nation is marking the 22nd anniversary of the terror attacks of September 11, 2001, when the terrorist group al-Qaeda flew hijacked airplanes into the World Trade Center, Shanksville, PA and the Pentagon, killing nearly 3,000 people. (Photo by Probal Rashid/LightRocket via Getty Images)