Marines in the Lance Corporal Seminar run to the top of a hill during a morning physical fitness seminar held at Marine Corps Air Station here July 25. The Lance Corporal Seminar is a three-day course that the air station started this year to provide junior Marines with the knowledge and skills to progress in their military careers. - Marines in the Lance Corporal Seminar run to the top of a hill during a morning physical fitness seminar held at Marine Corps Air Station here July 25. The Lance Corporal Seminar is a three-day course that the air station started this year to provide junior Marines with the knowledge and skills to progress in their military careers.