A U.S. Air Force Airman assigned to Tinker Air Force Base, Oklahoma, prepares a U.S. Air Force E-3 Sentry Airborne Warning and Control System aircraft for maintenance in support of Exercise Baltic Operations at NATO Air Base Geilenkirchen, Germany, June 5, 2018. More than 5,700 personnel, 17 countries, and more than 40 aircraft are participating in BALTOPS in 2018. (U.S. Air Force photo by Airman 1st Class Christopher S. Sparks)

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Photo by: Airman 1st Class Christopher S. Sparks |  VIRIN: 180605-F-HC907-0385.JPG