Amanda M. Penner, a student of the strategic studies program at Johns Hopkins School of Advanced International Studies, is taught how to properly hold an FIM-92A Stinger weapon system by a 3rd Low Altitude Air Defense Battalion Marine at the weapons and tactics instructor course at Marine Corps Air Station Yuma, Ariz., April 16. - Amanda M. Penner, a student of the strategic studies program at Johns Hopkins School of Advanced International Studies, is taught how to properly hold an FIM-92A Stinger weapon system by a 3rd Low Altitude Air Defense Battalion Marine at the weapons and tactics instructor course at Marine Corps Air Station Yuma, Ariz., April 16.