President Biden, first lady Jill Biden and Vice President Kamala Harris will all take part in ceremonies to honor the victims of the Sept. 11 terrorist attacks on Sunday.

The president will deliver remarks and take part in a wreath-laying ceremony at the Pentagon, while Jill Biden will travel to Shanksville, Pa., where she will deliver remarks at the Flight 93 National Memorial Observance, according to a White House pool report. 

Harris and her husband, Doug Emhoff, will participate in a commemoration at the National September 11 Memorial in New York. 

The White House said additional details about the appearances will be announced this week. 

Last year, Biden attended ceremonies at all three locations.