On the 20th anniversary of the 9/11 attacks, the nation pauses to remember. Ceremonies take place at memorials in New York City; Shanksville, Pa.; and at the Pentagon in Arlington, Va. President Biden travels to all three sites today to pay respects. And former president George W. Bush speaks at the Flight 93 Memorial in Pennsylvania
Watch Live: A Day of Remembrances and Reflection: 20 Years After 9/11
Liam James Doyle/NPR
