U.S. Marine Corps photo by Chris Jones/Released 180214-M-MV315-026.JPG
Feb 15, 2018
Petty Officer 3rd Class Herbert Peterson, corpsman, 3rd platoon, Charlie Co., Fleet Anti-terrorism Security Team, U.S. Marine Corps Security Forces Regiment, looks in a window at Marines from various FAST units conducting a protective mask verification exercise, aboard Naval Weapons Station Yorktown, Va., Feb. 14. Marines were exposed to 2-chlorobenzalmalononitrile, or CS gas, which caused irritation in the mucus membranes resulting in watery eyes, coughing, and other symptoms. (Official U.S. Marine Corps photo by Chris Jones/Released)
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