U.S. Marine Corps Sgt. Jesse Clay, Sgt. Jenna Cauble, and Sgt. Alberto Deloreyes, instructors with Corporals Course class 6-18, Marine Corps Air Station (MCAS) Yuma, Ariz., pose for a group photo after conducting an obstacle course on MCAS Yuma, Ariz., June 15, 2018. Marines, Sailors and Airmen attended the two week course focused on Marine Corps leadership, standards, professional development and physical fitness. (U.S. Marine Corps photo by Sgt. Allison Lotz) - U.S. Marine Corps Sgt. Jesse Clay, Sgt. Jenna Cauble, and Sgt. Alberto Deloreyes, instructors with Corporals Course class 6-18, Marine Corps Air Station (MCAS) Yuma, Ariz., pose for a group photo after conducting an obstacle course on MCAS Yuma, Ariz., June 15, 2018. Marines, Sailors and Airmen attended the two week course focused on Marine Corps leadership, standards, professional development and physical fitness. (U.S. Marine Corps photo by Sgt. Allison Lotz)