Hope and heroism: Obama hails post-9/11 resilience - Article Photos 15/28

President Barack Obama walks past a reflecting pool near the bronze-etched names of the victims of the terrorist attack 10 years ago 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)