Live stream: America remembers 9/11 on 20th anniversary

Biden to visit memorial sites on anniversary of terrorist attacks

NYC Ground Zero memorial (KSAT)

Watch live coverage of Sept. 11 anniversary ceremonies in New York City, Shanksville, Pa., and outside Washington, D.C., at the Pentagon.

President Biden will visit all three memorial sites.

Watch live beginning at 8:30 a.m. Saturday:

9/11 -- 20 years later