Spc. Ashley Carter, a North Carolina National Guard Soldier assigned to the 30th Armored Brigade Combat Team headquarters, tightens the straps on her protective mask during Chemical, Biological, Radiological and Nuclear training April 8, 2015, during the unit’s Annual Training at Fort Pickett, Virginia. The training event included familiarization with the updated M50 mask’s improved strap system and lower-profile filter. (U.S. Army photo by Staff Sgt. Mary Junell, 30th ABCT)