Secretary of Defense James Mattis will host the ceremony honoring the 184 people killed in the attack at the Pentagon.
At 9:37 a.m. on Monday, the exact time that American Airlines Flight 77, carrying 64 people on a flight bound for Los Angeles, was flown into the side of the Pentagon on Sept. 11, 2011, the president will lead a moment of silence.
Vice President Mike Pence will travel to Shanksville, Pennsylvania, for a separate ceremony at the location of the Flight 93 Memorial.
Last week, Trump proclaimed Sept. 11 as “Patriot Day.”
“We rededicate ourselves to the ideals that define our country and unite us as one, as we commemorate all the heroes who lost their lives saving others,” said Trump in a statement.
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