Grismer visits Bio Environmental
Col. Michael Grismer, 436th Airlift Wing commander, adjusts the tension on straps of a M50 joint service protective gas mask during a visit to the 436th Aerospace Medicine Squadron Biological Environmental Flight July 17, 2015, at Dover Air Force Base, Del. Grismer donned the gas mask and did a fit and function test while learning about the mission of the flight during his visit. (U.S. Air Force photo/Greg L. Davis)
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