Airmen unpack a Quiksilver chemical and biological testing kit during a demonstration at Joint Base Charleston - Air Base on April 16. Bioenvironmental Engineers perform health risk assessments for everyone on base to keep them safe from whatever exposures their job may present. The Airmen are 628th Aerospace Medicine Squadron bioenvironmental engineering technicians. (U.S. Air Force photo by Airman 1st Class George Goslin/Released)