U.S. President Barack Obama (R) and former New York Mayor Michael Bloomberg look at the faces of those who died during the 9/11 attacks at the National September 11 Memorial Museum in New York May 15, 2014. The museum, memorializing the September 11, 2001 attacks, opens this week to victims' family members and next week to the public, displaying artifacts from mangled columns recalling the enormity of that fateful day to shattered eyeglasses recalling its personal pain. (REUTERS/Kevin Lamarque)
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