U.S. Marine Corps Marine Wing Support Squadron 171 conducted exercise Tanuki Wrath on Marine Corps Air Station Iwakuni, Japan, March 22, 2017. MWSS-171 conducted the exercise to help train Marines to set up security around a downed aircraft and how to control a riot. - U.S. Marine Corps Marine Wing Support Squadron 171 conducted exercise Tanuki Wrath on Marine Corps Air Station Iwakuni, Japan, March 22, 2017. MWSS-171 conducted the exercise to help train Marines to set up security around a downed aircraft and how to control a riot.