US President Donald Trump has presided over his first 9/11 commemoration in office, marking the 16th anniversary of the attacks.
He and first lady Melania observed a solemn moment of silence at the White House and later at the Pentagon.
According to BBC News, thousands are gathering nationwide to mark the deadliest attack on US soil.
Nearly 3,000 people died after hijackers crashed planes into New York’s World Trade Center, the Pentagon and a rural Pennsylvania field in 2001.
The names of the 3,000 killed were being read aloud at the 9/11 Memorial and Museum as bells rang out in memory of the dead.