Power System An engineer works on a hybrid power system as part of the Army’s ongoing research in tactical microgrids, which provide resilient and efficient power for soldiers in the field, Aberdeen Proving Ground, Md., June 16, 2020. SHARE IMAGE: Download Image: Full Size (1.16 MB) Photo By: Daniel Lafontaine, Army VIRIN: 200616-O-AQ639-767C.JPG Photo Gallery