911 Memorial Museum

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The ''Survivor's Stairs'' are seen inside the 911 Memorial Museum, which is under construction, at the World Trade Center site in New York, July 2, 2013. On September 11, 2001, this staircase offered a clear exit from the World Trade Center Plaza to Vesey Street, providing a means of escape for hundreds fleeing from the towers after the attacks and became symbolic of survival and acquired the name ''Survivor's Stairs''. REUTERS/Mike Segar