Former President George W. Bush And Former First Lady Laura Bush Listen

President Barack Obama and First Lady Michelle Obama, along with former President George W. Bush and former First Lady Laura Bush, listen to a speaker during the commemoration ceremony at the National September 11 Memorial in New York, N.Y., on the tenth anniversary of the 9/11 attacks against the United States, Sunday, Sept. 11, 2011. (Official White House Photo by Pete Souza)