A reunion 40 years in the making, but the man who showed up was a stranger.

In 1986, Holocaust survivor Miklós Grüner went to meet his old friend, Lázár Wiesel. Instead, he came face-to-face with Nobel Laureate Elie Wiesel. Grüner’s claim? "This is not the man I knew."

Was it a case of stolen identity, or a tragic lapse in memory?