The Wall Street Journal has a lengthy article exposing the terrible toll the attempt to find out what happened to Raoul Wallenberg took on his family. It is a horrifying tale and reminiscent of the brutality of the Soviet regime [and post-Soviet as well... after all Putin could clear up the mystery in a nano-second].
In addition to the Soviets, who were the main culprits, Sweden failed to do much to pursue Wallenberg's fate. This constitutes an enduring blot on Sweden's reputation.
Wallenberg demonstrated how different the story of the Holocaust would have been had there been more people such as him.