Airmen from the 779th Medical Group bioenvironmental flight move towards the simulated fuel spill while testing the air for hazards using a gas meter and a toxic vapor analyzer, Feb. 8, at Joint Base Andrews. Personnel all over Joint Base Andrews participated in the exercise which consisted of a fuel truck crashing into a bus carrying passengers. The exercise was conducted to test the emergency response actions of the installation’s first responders as well as prepare Joint Base Andrews for the upcoming Compliance Inspection. (U.S. Air Force photo/ Senior Airman Perry Aston)