VIDEO: One can't imagine the pain of seeing what first responders see when they pull up to a car accident, a drowning or a shooting. That's why a group of firefighters is tapping into their faith to help them cope with the trauma. "Even though we chose this career, we know that it takes its toll on us," said Surprise Fire Department chaplain Nick Petrucci said. Petrucci started the Christian-based group he dubbed Koinonia, which is Greek fellowship or joint participation, while serving as a Phoenix firefighter. The group began with a few firefighters meeting in a room in his home. Today, it's grown to 100 members.