Keywords: bulgaria nato operation atlantic resolve operationatlanticresolve oar zu-23-2 zu232 novo selo training center novoselotrainingcenter outdoor vehicle truck car 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 U.S. and partner nations conducted land, sea and air exercises and maintained a rotational presence in order to reinforce NATO security commitments in Europe. (U.S. Army photo by Staff Sgt. Steven M. Colvin). . 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 U.S. and partner nations conducted land, sea and air exercises and maintained a rotational presence in order to reinforce NATO security commitments in Europe. (U.S. Army photo by Staff Sgt. Steven M. Colvin). . |