Soldiers assigned to the 252nd Engineer Company, 103rd Engineer Battalion, 213th Regional Support Group, Pennsylvania Army National Guard, return fire, providing a casualty and fellow soldiers cover as they perform lifesaving techniques during a Combat Lifesaving Course Nov. 6, 2013. Simulated enemy fire, in addition to the low-lighting and sounds of gun fire and explosions added to the realism of the practical exercise of the Combat Lifesaver Course.