An F-16 Aggressor trails beneath a KC-135 Stratotanker as it prepares to refuel August 13, 2010, Eielson Air Force Base, Alaska. The 168th Air Refueling Wing mission is to train and equip KC-135R combat crews to provide air refueling in support of PACAF Operations Plans and worldwide refueling taskings. Red Flag Alaska serves as an opportunity to train tankers and guardsmen to fulfill the PACAF mission. (U.S. Air Force photo/Airman 1st Class Yash Rojas)