President Joe Biden and Vice President Kamala Harris are planning to travel to the three sites of the Sept. 11, 2001, terrorist attacks on Wednesday to mark the 23rd anniversary of the tragedy that killed nearly 3,000 people, the White House said last week.

And former President Donald Trump, the Republican nominee, will travel to New York and Pennsylvania on Wednesday, a source familiar with his plans told The Associated Press.

The Democratic duo will travel to World Trade Center site in New York, also known as Ground Zero, the Flight 93 Memorial in Shanksville, Pennsylvania, and the Pentagon in Virginia, the three sites of the 2001 terrorist attacks carried out by al-Qaeda.

"You will see the president and vice president next week together as they mourn the thousands of lives that were lost on that day and also the first responders who obviously put their lives on the line to protect Americans on that day," White House press secretary Karine Jean-Pierre said at a briefing Wednesday ahead of the announcement.

Trump, a native New Yorker, is set to visit the 9/11 memorial site in lower Manhattan. It's not clear if Trump and Harris will intersect at any of their stops.

The travel is set to come one day after the first debate between Harris and Trump in Philadelphia on Tuesday, Sept. 10.

Harris attended the ceremony at the National September 11 Memorial & Museum in lower Manhattan for the last two years, commemorating the victims of the attack with state and city leaders, as well as victims' families.

Biden commemorated the attack last year in Alaska, speaking to service members and taking part in a remembrance ceremony at Joint Base Elmendorf-Richardson. Biden visited all three sites in 2021 to mark the 20th anniversary of the attacks.