At 15:36 hrs Co.24 was alert to assist with Rescue Box 17 at the 7500 block of Green Valley Rd. As units arrived on scene they confirmed they had one PT trapped with an extended ETA. Command was established and a request was made for trooper 3 also additional units for transport of patients on the school bus. As units arrived on scene they were appointed to a patient from the school bus. One patient was extricated from the vehicle and flown to shock trauma in Baltimore and other patient's were transported to FMH. Command was terminated and units were in service.