Imagine that your 11-year-old son has just accidentally set himself on fire, and has burns over much of his body. You would probably want him treated at a pediatric emergency room, which specializes in children's injuries. Six years ago, there were no such facilities. Today there are more than 350, and the field is growing. Cincinnati Children's Hospital Medical Center is one of the country's busiest, with about 80,000 visits a year. 48 Hours went behind the scenes at Cincinnati Children's Hospital for a firsthand look at two days and nights of fast-paced lifesaving.