This March 15, 2011 photo shows the Freedom Tower, right, rising above the World Trade Center site 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)