Theirs is a reputation forged in fire -- built on bravery, dedication and danger. But privately, theres a dark side; a burning secret inside so many fire halls across .br fifth estate co-host Mark Kelley stops by CBC News Network to talk about this weeks show The Fire Within. Theirs is a reputation forged in fire -- built on bravery, .br Theirs is a reputation forged in fire -- built on bravery, dedication and danger. But privately, theres a dark side; a burning secret inside so many fire halls across .