Sgt. Maj. Derek Fry, the Marine Aircraft Group 13 sergeant major and Lance Corporal Leadership and Ethics Seminar director, briefs an audience of Marines on the history of MAG-13 aboard Marine Corps Air Station Yuma, Ariz., Monday, Jan. 12, 2015. The seminar provided an opportunity to enhance the Marines’ leadership development through small group discussions with course instructors. - Sgt. Maj. Derek Fry, the Marine Aircraft Group 13 sergeant major and Lance Corporal Leadership and Ethics Seminar director, briefs an audience of Marines on the history of MAG-13 aboard Marine Corps Air Station Yuma, Ariz., Monday, Jan. 12, 2015. The seminar provided an opportunity to enhance the Marines’ leadership development through small group discussions with course instructors.