Article Photos: Smaller memorials on 11th anniversary of 9/11



President Barack Obama and first lady Michelle Obama join members of the White House staff during a moment of silence to mark the 11th anniversary of the Sept, 11th, Tuesday, Sept. 11, 2012, on the South Lawn of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)

President Barack Obama and first lady Michelle Obama join members of the White House staff during a moment of silence to mark the 11th anniversary of the Sept, 11th, Tuesday, Sept. 11, 2012, on the South Lawn of the White House in Washington. (AP Photo/Pablo Martinez Monsivais)