120th Airlift Wing Tech Sgt. Lee Dresch reads information found on chemical containers to Tech. Sgt. Dale Vig at a simulated hazardous material spill during a Hazardous Waste Operations and Emergency Response (HAZWOPER) class held at the 120th Airlift Wing in Great Falls Mont. May 20, 2016. The 120th AW offers a 40 hour course and 8 hour refresher course annually. (U.S. Air National Guard photo/Senior Master Sgt. Eric Peterson)