A U.S. Service member wears a gas mask during a chemical, biological, radiological, nuclear (CBRN) hazard scenario during Active Shield 2011 at Marine Corps Air Station Iwakuni, Japan, March 2, 2011. Active Shield is a combined anti-terrorism training exercise intended to strengthen cooperation between U.S. and Japanese forces in the Iwakuni-Hiroshima region and prepare Japanese forces to guard U.S. facilities if needed.
Cpl Andrea M. Olguin
Taken on 2 March 2011
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