If anyone in America is prepared for the devastation at the World Trade Center, it’s 49-year-old Tim Gallagher, former firefighter and now a leader of the Texas Urban Search-and-Rescue team. “I spent almost 20 years on the street as a paramedic, Gallagher tells 48 Hours Correspondent Harold Dow. “Trauma was an everyday part of my life.” He thought he had seen everything until six years ago, when his team was deployed to help with the aftermath of the Oklahoma City bombing. But that was before Sept. 11.