WATCH: 9/11 is remembered from Ground Zero, 21 years later

FILE - In this June 7, 2018, file photo, the September 11 Memorial and Museum are seen from an upper floor of 3 World Trade Center in New York. A U.S. Army soldier was arrested Tuesday, Jan. 19, 2021, in Georgia on terrorism charges after he spoke online about plots to blow up New York City's 9/11 Memorial and other landmarks and attack U.S. soldiers in the Middle East, authorities said. (AP Photo/Mark Lennihan, File) (Mark Lennihan, Copyright 2018 The Associated Press. All rights reserved.)

9/11 is remembered from Ground Zero, 21 years later. Names of victims will be read aloud, along with several moments of silence to mark the attacks.