Drone video shows the Auschwitz-Birkenau concentration camp as it is today - 70 years after it was liberated by Soviet troops. The camp in Poland is now maintained as a World Heritage Site and is visited by thousands of tourists and survivors every year. Auschwitz was the largest camp established by the Germans during World War II. More than a million people - the vast majority of them Jews - died there between 1940, when it was built, and 1945, when it was liberated by the Soviet army. Railway
