SHANKSVILLE — Former President George W. Bush will speak at this week’s dedication of the Flight 93 National Memorial.

The National Park Service and National Park Foundation announced Tuesday that Bush, who was in office when the plane crashed on Sept. 11, 2001, will join Vice President Joe Biden and Flight 93 family members. Also attending Saturday’s event will be former first lady Laura Bush, Secretary of the Interior Ken Salazar and National Park Service Director Jon Jarvis.

The memorial honors those killed on United Airlines Flight 93, which crashed in Shanksville. Forty passengers and crew members died after fighting with hijackers for control of the plane.