n airfield in Sofia, Bulgaria with several gray KC-135 Stratotanker aircraft parked on the tarmac

n airfield in Sofia, Bulgaria with several gray KC-135 Stratotanker aircraft parked on the tarmac. The airfield is elevated, with a grassy embankment separating it from a lower area with trees and walking paths. The sky is overcast. In the foreground, there is a park with a concrete path winding through it. There are deciduous trees that appear to be beginning to bud in the spring. Streetlights are seen along the path. On the embankment, there are patches of dark vegetation and yellow flowers among the grass. In the background, multiple KC-135 aircraft are parked, with what looks like ground support vehicles near one of the planes. There are tall light poles at the airfield.