Capt. Eli Spring a KC-135 Stratotanker pilot from the 909th Air Refueling Squadron, goes through a pre-flight check list in preparation for a refueling mission during Exercise WestPac Rumrunner, Oct. 16, 2020, at Kadena Air Base, Japan. PACAF is validating new ways to deploy and maneuver assets in order to operate in contested environments through exercises, engagements and operations like WestPac Rumrunner. The 18th Wing-led exercise represents an evolution in the capabilities of 18th Wing assets to work with joint partners to defend American allies and ensure a free and open Indo-Pacific. (U.S. Air Force photo by Airman 1st Class Rebeckah Medeiros)