200131-N-ON977-1042 NORFOLK (Jan. 31, 2020) Cmdr. William Wiley, right, commanding officer of the Virginia-class attack submarine USS John Warner (SSN 785), briefs Gen. Gary L. Thomas, assistant commandant of the Marine Corps, U.S. Marine Corps senior leaders and Rear Adm. Jim Waters, commander of Submarine Group 2, during a tour of John Warner, Jan. 31, 2020. The Marine Corps key leadership engagement at Naval Station Norfolk was part of the joint service effort to integrate U.S. Marine Corps and U.S. Navy in response to great competition that threatens international maritime law and U.S. national security. (U.S. Navy photo by Mass Communication Specialist 2nd Class Alfred A. Coffield/Released)