180730-A-JA380-042 Air National Guardsmen guide a grading vehicle onto a loading dock during the Deployable Air Base System proof of concept exercise at the 31st Tactical Air Base in Poznan-Krzesiny, Poland, July 30, 2018. Army photo by Spc. Craig Jensen SHARE IMAGE: Download Image: Full Size (1.36 MB) Photo By: Spc. Craig Jensen VIRIN: 180730-A-JA380-042.JPG Photo Gallery