President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE and first lady Melania Trump Melania TrumpWatchdog confirms State Dept. canceled award for journalist who criticized Trump Ginsburg becomes the first woman to lie in state in the Capitol Rabbi memorializes Ginsburg: Her dissents were 'blueprints for the future' MORE on Wednesday will participate in an observance ceremony at the Pentagon marking the 18th anniversary of the Sept. 11 terrorist attacks.

The event is scheduled to begin at 9:30 a.m.

You can watch it live in the video player above.