I've visited Auschwitz. Some people say they don't hear birds singing there. I did. But it was a warm July day outside, and inside the camp it was cold. Something there will never forget.

I firmly believe that anyone who is, or who has any pretentions of becoming, a national leader (of any nation, and not necessarily the top rank, but anyone in the close line of succession) should visit at the very least Auschwitz and Hiroshima.