Opinion: Hitler couldn't defeat our 96-year-old friend. Now Putin has killed him

The work week at the Buchenwald Memorial -- which honors the lives lost at the Buchenwald Nazi concentration camp -- began Monday with a shock: In the morning, we received the news from Ukraine that our friend Boris Romantschenko, a survivor of Buchenwald and three other concentration camps, had died when a Russian missile struck his multi-story apartment building in Kharkiv.