Article Photos: Hope and heroism: Obama hails post-9/11 resilience 13/28

  President Barack Obama walks past a reflecting pool with his wife Michelle, and former President George W. Bush and his wife, Laura, as they arrive for the ceremony marking the 10th anniversary of the attacks, Sunday, Sept. 11, 2011 in New York. Two reflecting pools built over the towers' footprints, part of a Sept. 11 memorial that was to open later in the day for relatives of the victims. (AP Photo/Mark Lennihan)