A U.S Marine Corps unit commander briefs attendees of a Marine Corps University’s Corporals Course about what it means to be a noncommissioned officer, Prince Sultan Air Base, Kingdom of Saudi Arabia, June 7 2021. The professional development course, hosted by Marines stationed at PSAB, is a 14-day formal training event designed to educate Marine corporals on the duties and responsibilities of a noncommissioned officer. (U.S. Air Force photo by Senior Airman Samuel Earick)