The aircraft carrier USS Ronald Reagan (CVN 76) leads a formation of Carrier Strike Group (CSG) 5 ships as Air Force B-52 Stratofortress aircraft and Navy F/A-18 Hornets pass overhead for a photo exercise during Valiant Shield 2018. The biennial, U.S.-only, field-training exercise focuses on integration of joint training among the Navy, Air Force and Marine Corps. (U.S. Navy photo by Mass Communication Specialist 3rd Class Erwin Miciano)