U.S. Senior Airman John Johnson, 74th Expeditionary Fighter Squadron crew chief, works on the brake system of an A-10 Thunderbolt II attack aircraft on the flightline at Amari Air Base, Estonia, Oct. 5, 2015. As a crew chief, Johnson is responsible for maintaining the fleet of 12 A-10 aircraft deployed from team_moody , Ga., as part of a Theater Security Package in support of Operation Atlantic Resolve. Follow team_moody for more great Air Force imagery! #teammoody #thunder #nofilter #OAR #flyingtigers #airman #airforce #airmanmagazine #aviation #pilot #aerial #jet #jets #plane #planes #usairforce #fly #usmilitary #a10 #thunderbolt #estonia