Marines and Japan Ground Self-Defense Force soldiers take a stance after a simulated riot control situation during Exercise Guard and Protect at Marine Corps Air Station Iwakuni, Japan, Oct. 20-23, 2015. Marines and JGSDF soldiers were challenged with real world situations such as riot control, armed intruder response and vehicle searches to prepare in case the air station has to take a defense posture. - Marines and Japan Ground Self-Defense Force soldiers take a stance after a simulated riot control situation during Exercise Guard and Protect at Marine Corps Air Station Iwakuni, Japan, Oct. 20-23, 2015. Marines and JGSDF soldiers were challenged with real world situations such as riot control, armed intruder response and vehicle searches to prepare in case the air station has to take a defense posture.