Biden and former Presidents Obama, Clinton and Bush to travel to sites of 9/11 attacks

President Joe Biden pauses as he speaks from the White House on September 9. (Andrew Harnik/AP)

President Biden and first lady Jill Biden will travel to all three sites of the 9/11 terrorist attacks today, marking the 20th anniversary of the deadly day, according to the White House.

The President and first lady will visit New York City, Shanksville, Pennsylvania, and the Pentagon in Arlington, Virginia.

Vice President Kamala Harris and second gentleman Doug Emhoff will travel to Shanksville, the site of the United Flight 93 crash, for a separate event, before joining the President and first lady at the Pentagon.

Former President Barack Obama and former first lady Michelle Obama will attend the remembrance ceremony in New York, an Obama spokesperson tells CNN.

Former President George W. Bush and former first lady Laura Bush will also travel to Shanksville. The George W. Bush Presidential Center announced the 43rd President would deliver keynote remarks in a ceremony open to the families of those killed on United Flight 93 and invited guests.

Former president Bill Clinton and former Democratic presidential nominee Hillary Clinton will attend the 9/11 remembrance ceremony in New York City on Saturday, according to each Clinton’s spokesperson.

CNN’s Dan Merica contributed to this post.