U.S. Army Maj. Peter C. Mueller, Army Futures Command simulations and modeling officer, reads a flyer during the Tactical and Tech Day Expo at Joint Base Langley-Eustis, Virginia, June 12, 2019. Several local and nationwide companies showcased their products at the expo in an effort to market to tactical defense needs and collaborate with JBLE units. (U.S. Air Force photo by Airman 1st Class Monica Roybal)