Oprah Winfrey is still haunted by her visit to the Auschwitz concentration camp in southern Poland earlier this year. The billionaire media mogul, 52, traveled to Eastern Europe with holocaust survivor Elie Wiesel, author of her memoirs "Night."

At a fundraiser for the Holocaust Memorial Museum in Chicago, Illinois, on Wednesday, Winfrey told the 3,000-strong crowd, she is struggling to come to term with her trip to Auschwitz.

She said, "I still cannot even imagine what it was like to go through a concentration camp and come out alive and sane. I couldn't take it all in when I was there. I couldn't wrap my brain around it. Those millions and millions and millions who did not survive want us to never forget the hopes they sacrificed on the killing fields. Each of us has a responsibility, we have a moral obligation to find a way to serve somebody other than ourselves."

At least 1.1 million people were killed in the camp during World War II.

(This news article provided by World Entertainment News Network)