Senior Airman Jonell Sanchez, an air traffic controller assigned to the 28th Operations Support Squadron, transfers beacon codes during a training simulation at Ellsworth Air Force Base, , Jan. 25, 2017. Air traffic controllers maintain a safe environment for pilots by providing safety alerts and managing the flow of aircraft in and out of airspace.

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Photo credit: © Chuck Little / Alamy / Afripics
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Keywords: 28th, afb, afgsc, air, america, archive, armed, army, defence, eafb, ellsworth, force, forces, military, navy, oss, radar, reportage, service, serviceman, servicemen, soldier, states, training, united, usa