President Obama, first lady Michelle Obama and members of the White House staff pause Sept. 11, 2012, on the South Lawn of the White House in Washington during a moment of silence to mark the 11th anniversary of the terrorist attacks. (Associated Press)

Photo by: Pablo Martinez Monsivais

President Obama, first lady Michelle Obama and members of the White House staff pause Sept. 11, 2012, on the South Lawn of the White House in Washington during a moment of silence to mark the 11th anniversary of the terrorist attacks. (Associated Press)