United States President Barack Obama, First Lady Michelle Obama, former U.S. President George W. Bush and former First Lady Laura Bush attend the Commemoration Ceremony at the National September 11 Memorial at the World Trade Center Site in New York, New York on September 11, 2011. The President and First Lady are also visiting the Pentagon and the crash site of Flight 93 in Shanksville Pennsylvania in a series of events to commemorate the 10th anniversary of the attacks. .Credit: Kristoffer... more »
United States President Barack Obama, First Lady Michelle Obama, former U.S. President George W. Bush and former First Lady Laura Bush attend the Commemoration Ceremony at the National September 11 Memorial at the World Trade Center Site in New York, New York on September 11, 2011. The President and First Lady are also visiting the Pentagon and the crash site of Flight 93 in Shanksville Pennsylvania in a series of events to commemorate the 10th anniversary of the attacks. .Credit: Kristoffer Tripplaar / Pool via CNP « less
