The 7th Poznan Fortress Days
An U.S. Army Soldier from 543rd Composite Supply Company shows Polish citizens how to use night vision goggles at Poznan Fortress Days event, August 24-25, 2019, in Poznan, Poland. Poznan Fortress Days is an annual two-day Polish holiday, which celebrates Poznan Fortifications from the Middle Ages to the present day. (U.S. Army photo by Pvt. Joanna Gaona Gomez)