LANGLEY AIR FORCE BASE, Va. –Tech. Sgts. Michael Woodburn (left) and Leon Johnson (right), 633d Aerospace Medicine Squadron bioenvironmental technicians, ensure protective equipment is properly donned during a Chemical Biological Radiology Nuclear Challenge Jan. 14. The fifth annual CBRNE challenge is an exercise that tests the base’s hazardous incident response capabilities. (U.S. Air Force photo/ Senior Airman Dana Hill)