Keywords: Don and Clear (10207367466).jpg Marines prepare for annual gas chamber training aboard Marine Corps Air Station Beaufort S C Oct 10 2013 The training was held at the Chemical Biological Radiological Nuclear Facility and consisted of proper equipment handling cleaning of the M50 gas mask and properly demonstrating their ability to use the mask in the event of a chemical threat U S Marine Corps photo by Cpl Aneshea S Yee/Released https //www flickr com/photos/marine_corps/10207367466/ Don and Clear 2013-10-10 08 50 https //www flickr com/people/40927340 N03 Marines from Arlington VA United States PD-USGov United States Marine Corps Official Page https //flickr com/photos/40927340 N03/10207367466 2016-09-03 22 15 54 United States Government Work Amphibious forces M50 Joint Service General Purpose Mask |