"The massacre of many thousands of Jews, Soviet prisoners of war, Ukrainian nationalists, Roma and others at Babyn Yar was one of the worst horrors of the Second World War," Annan said in a message delivered Wednesday by U.N. Resident Coordinator in Ukraine Francis O'Donnell.
"If we are to have any chance of sparing future generations from similar tragedies, we must keep memory alive," Annan said.
Annan said the world must reject claims of those who say the Holocaust never happened or has been exaggerated, the U.N. News Service reported.
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