Bells Tolled at 8:46am at Ground Zero

Victims' relatives, survivors, and rescuers are observing the 16th anniversary of the Sept. 11 attacks at Ground Zero. Monday's commemoration began with a moment of silence and tolling bells at 8:46am, the moment a plane slammed into the World Trade Center's north tower, per the AP. Victims' relatives then began reading the names of the nearly 3,000 people killed when four hijacked planes hit the trade center, the Pentagon, and a Pennsylvania field on Sept. 11, 2001.

President Trump, a native New Yorker, observed a moment of silence at the White House and then was to participate in an observance at the Pentagon. It's his first time observing the anniversary as president. Another ceremony was to take place at the Flight 93 National Memorial near Shanksville, Pa. (More Ground Zero stories.)