Poland: Around 200 survivors returned to Auschwitz to attend a memorial event today.
Delegates from 50 countries also attended the memorial event.
Auschwitz (Poland) concentration camp was a Nazi facility where hundreds of thousands Jews were massacred during second World War.
Auschwitz was liberated from Nazi-Germany in 1945.
A memorial event is held every year to remember those who had lost their lives in Auschwitz death camp.
Survivors said that the lessons and loss of Auschwitz must be remembered so that nothing like that gets repeated.