The Hill News

President Obama will commemorate the ninth anniversary of the 9/11 attacks at a memorial service at the Pentagon.

White House press secretary Robert Gibbs said that the president would attend a service at the Pentagon, while Vice President Joe Biden will travel to "Ground Zero," the site of the attacks on the World Trade Center in Manhattan, for a separate service.

First lady Michelle Obama and former first lady Laura Bush will attend a memorial service in Pennsylvania, the site of the plane crash of Flight 93.

The president last year attended a wreath-laying ceremony at the Pentagon.

"Let us renew our resolve against those who perpetrated this barbaric act and who plot against us still," he said at that ceremony. "In defense of our nation we will never waver; in pursuit of al Qaeda and its extremist allies, we will never falter."