Final steel beam lifted at 4 World Trade Center
Four World Trade Center
Construction workers and officials watch as the ceremonial last beam is hoisted to the top of Four World Trade Center, Monday, June 25, 2012. The 72-floor, 977-foot tower is scheduled to open late next year. It's expected to be the first tower completed on the 16-acre site since the 9/11 attacks. (AP Photo/Mark Lennihan)






