U.S. Air Force Senior Airman Senior Airman Patrick Imbriano, 7th Aerospace Medicine Squadron, and Senior Airman Jude Stueckle, 7th Civil Engineering Squadron, pull surveying equipment to a mock contaminated area March 5, 2015, at Dyess Air Force Base, Texas. Different tools and testing implements were to identify the liquid in a spray bottle used by the simulated enemy combatant during an annual training exercise. (U.S. Air Force photo by Airman 1st Class Alexander Guerrero/Released)