The September 11 cross is lowered by crane into a subterranean section of the National September 11 Memorial and Museum, Saturday, July 23, 2011 in New York. NEW YORK -- A cross-shaped steel beam found amid the wreckage in the days following the Sept. 11 terrorist attack was a symbol of hope for many working on rescue and recovery there, so much so that the construction worker who discovered it believes he stumbled on to a miracle. "I saw Calvary in the midst of all the wreckage, the disaster," Frank Silecchia recalled Saturday. "It was a sign ... that God...