The injured children came into the Children's Hospital at the Oklahoma University Medical Center in Oklahoma City fast. So fast that the hospital set up a triage center in its own facility. "Every once in a while, a trauma trickles into the emergency room at OU Children's," said Bob Letton, pediatric trauma medical director at the hospital. But not Monday. In the wake of a powerful tornado that ripped through the area, he said, "a facility used to seeing one or two traumas a day all of a sudden had over 50."