The ceremonies mark the 20th anniversary of the attacks on Sept. 11, 2001
WATCH LIVE: Names of those killed in 9/11 attacks read at Ground Zero in NYC
Updated: September 11, 2021 - 9:16am
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Terrorists who hijacked four commercial airliners killed nearly 3,000 people on Sept. 11, 2001, most of them when the attackers struck the World Trade Centers' Twin Towers.
On Saturday, surviving family members at Ground Zero in New York City, the site of the WTC attacks, will read the names of those whom they lost, starting at 8:40 a.m. ET.
You can watch the 20th anniversary commemoration ceremonies above or by clicking the player below.