Bulgarian soldiers sit on the back of a truck with a ZU-23-2 anti-aircraft 23mm autocannon during Exercise Peace Sentinel, part of Operation Atlantic Resolve, at Novo Selo Training Center, Bulgaria, Nov. 22, 2015. The and partner nations conducted land, sea and air exercises and maintained a rotational presence in order to reinforce NATO security commitments in Europe. ( Staff Sgt. Steven M. Colvin)

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Photo credit: © Military first collection / Alamy / Afripics
License: Licensed
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Keywords: atlantic, bulgaria, nato, oar, operation, resolve, zu-23, zu-23-2