Marine Corps Air Station Yuma, Ariz. -- U.S. Marines stationed on Marine Corps Air Station (MCAS) Yuma graduate from Lance Corpal Seminar 1-20 at the MCAS Yuma station chapel, Dec. 6, 2019. The purpose of the course is to help junior Marines develop an understanding of what it takes to be a leader of Marines, by teaching them leadership principles and leadership traits. (U.S. Marine Corps photo by Lance Cpl John Hall)