At 2144 hours Station 9, Rescue Squad 7, EMS Station 38, EMS Station 79, and the Medic Unit were dispatched to St. Andrews Church Rd in the area of the Walden Center for a Motor Vehicle Accident with possible entrapment. Rescue Squad 7 and Chief 7B responded shortly after dispatch with 7 volunteers. Engine 92 was first to arrive finding a 2 vehicle head-on collision with people trapped in both vehicles. Rescue Squad 7 arrived shortly after and the crew went to work stabilizing vehicles and preparing for the extrication. Rescue Squad 3 was added to the call by Engine 92 due to several people being trapped. The crews from Rescue Squad 7 and Rescue Squad 3 extricated both patients within 20 minutes of their arrival. One patient was transported by Trooper 7 to Baltimore Shock Trauma and two others were transported by ground to St. Mary's Hospital. Chief 7B (Riley) held the "St Andrews Command" with Lieutenant 7 (Bean) holding the "Extrication Group". Units returned to quarters at 2228 hours.