Polish citizens look at military vehicles at the Zbrojownia Firearms Collector’s Association’s annual Firearms Collectors Convention June 1st, 2019, at Fort IV Tietzen, Poznan, Poland. Zbrojownia Firearms Collector’s Association and other organizations have an annual Firearms Collectors Convention, which has over one hundred individual exhibitors of firearms, presentations of military vehicles, equipment and sightseeing of Fort Tietzen. (U.S. Army Photo by Pvt. Joanna Gaona Gomez)