Col. Bill Knight, 11th Wing/Joint Base Andrews commander (right), discusses a training scenario with United States Secret Service Special Agent Rob Donahue (left) and Major Aaron Rittgers (middle), 811th Security Forces Squadron commander, on The Courses at Andrews. The two-day training was the first large-scale contingency response exercise between Joint Base Andrews and the USSS. (U.S. Air Force Photo/Staff Sgt. Robert Cloys)