ATLANTIC OCEAN (May 22, 2021) The Military Sealift Command fast combat support ship USNS Supply (T-AOE 6), center, fuels the German navy frigate FGS Brandenburg, left, and the Spanish navy frigate ESPS Mendez Nunez (F-104), flagship for Standing NATO Maritime Group 2, off the coast of Portugal, May 21, 2021, during Exercise Steadfast Defender 21. Steadfast Defender is a defensive exercise based on an Article 5 scenario which is designed to deter aggression and respond to crisis if necessary. (Photo courtesy of the Spanish navy by Petty Officer Laura Pons Miles)