Air Force Staff Sgt. Scott Frank of the Fuels Management Flight at the 162nd Wing describes how fuel samples are pulled from a refueling truck’s filtration system to a group of U.S. Marines. Frank said this process is commonly known as the first line of defense in fuels quality control. Beginning in late March and ending in early June, the Marines will be training and executing operational tasks at the 162nd Wing. (U.S Air National Guard Photo by Tech. Sgt. Erich B. Smith/Released)