Marines with Weapons Company, 1st Battalion, 24th Marines, 25th Marine Regiment, 4th Marine Division, fire mounted MK-19 grenade launchers during exercise Nordic Frost at Camp Ethan Allen Training Site in Jericho, Vt., Jan. 19, 2018. The exercise allowed Marines to demonstrate their ability to operate in a cold weather mountainous environment, conducting land navigation, marksmanship training, demolitions, call for fire training and other core competencies. (U.S. Marine Corps photo by Pfc. Samantha Schwoch/released)