Staff Sgt. Xavier Refuge, a reconnaissance Marine with Special Purpose Marine Air-Ground Task Force - Southern Command, teaches an infantry patterns and techniques class during a certification exercise at Marine Corps Base Camp Lejeune, North Carolina, April 20, 2020.The CERTEX is the culmination exercise that will test the training and readiness of the Marines and Sailors of the SPMAGTF-SC for certification to deploy. Once certified, the SPMAGTF-SC will be ready to conduct crisis response, theater security cooperation training and general engineering projects alongside partner nation militaries in Latin America and the Caribbean. Refuge is a native of New Orleans, Louisiana. (U.S. Marine Corps photo by Sgt. Andy O. Martinez)