This March 15, 2011 photo shows construction cranes working above the 58th floor of the Freedom Tower, right, in New York. Rebirth has been slow in coming to ground zero, but with six months remaining until the first portions of the national 9/11 memorial are scheduled to open to the public, the work to turn a mountain of rubble into one of the world's great urban centers is thundering forward and beginning to produce some of the inspiring monuments designers envisioned nearly a decade ago. (AP Photo/Mark Lennihan)