Sea-Tac firefighters and police were joined by first responders from 18 other agencies around the South Sound for a required drill for an airplane crash on Wednesday. Using an old 757 fuselage mock up, the pretend scenario was the crash of a Boeing 737 with 150 people on board, just short and to the right of the airport's center runway. The 757 and 737 bodies are the same width. Most volunteers are airport employees made up with fake injuries, some gruesome. Firefighters first on the scene go through the victims and mark them with tape to determine their priority for handling. Ambulances are soon on the scene to transport the victims to area hospitals sorted out with the help of Harborview Medical Center.