Capt. Clinton Snow, company commander of Company E, 4th Combat Engineer Battalion, 4th Marine Division, briefs Marines on the safety procedures before conducting breach training during exercise Nordic Frost at Camp Ethan Allen Training Site in Jericho, Vt., Jan. 19, 2018. The goal of Nordic Frost was to improve the unit’s environmental capabilities by giving them an introduction to cold weather training and testing their squad and fire team level defensive proficiency in an austere environment. (U.S. Marine Corps photo by Pfc. Samantha Schwoch/released)