A Polish Land Forces soldier rides in an amphibious armoured personnel carrier as a helicopter flies overhead at the chemical, biological, radiological, nuclear, and explosive lane during MILITARY DOCTOR 20 at Training Field Jeżewo, Poland, July 30, 2020. Polish Land Forces cadets underwent testing and training during the event, which is required for them to become military doctors. Soldiers assigned to U.S. Army Europe with medical military occupational specialties were invited for a subject matter exchange.