Lieutenant Col. Lanson Ross, 756th Air Refueling Squadron pilot, and members of the development and training flight pose for a photo on the Joint Base Andrews, Maryland, flightline Feb. 12, 2017, following a tour of a KC-135R Stratotanker. DTF is a training and education program aimed at helping Air Force Reserve recruits prepare for basic training and life as an enlisted member. After four months of attendance with passing fitness and . DTF is a training and education program aimed at helping Air Force Reserve recruits prepare for basic training and life as an enlisted member. After four months of attendance with passing fitness and learning scores they are treated to a tour of one of the 459th Air Refueling Wing's eight refueling aircrafts. (U.S. Air Force photo/Tech. Sgt. Kat Justen)