Dennis O’Berg, 28, a probie, was only six weeks out of the Fire Academy and married just 11 months. He was an accountant for a year before changing his mind and entering his father’s profession. He loved his new job. His dad, a lieutenant, was a 31-year FDNY vet. He was also called to the WTC but arrived in time to see the South Tower collapsing in front of him as they came down Liberty Street. Several hours later, after putting out a fire in the Presidential a block away, other firefighters led him to the ruins of Ladder 105 under the Marriott. “It’s not supposed to happen that way,” he thought – son before the father. So he retired. He spent the next many many months working the pile. Dennis was never found.