President Obama and First Lady Michelle Obama mark the 11th anniversary of the 9/11 attacks by observing a moment of silence on the South Lawn of the White House.
President Obama marks the eleventh anniversary of the September 11, 2001 attacks at a memorial service at the Pentagon.
Vice President Biden marks the eleventh anniversary of the September 11, 2001 attacks at a memorial service at the Flight 93 National Memorial in Shanksville, Pennsylvania.
