Army Staff Sgt. Esteban Arenas checks his shot grouping after firing an M16 rifle during a weapons qualification test at a military shooting range in Landstuhl, Germany, Feb. 25, 2016. Arenas and other soldiers at the range wore advanced combat helmets and other personal protective equipment to protect themselves from possible injuries, such as traumatic brain injuries. DoD photo by Air Force Tech. Sgt. Brian Kimball