Godwin's Law! Debate over.
"The AP also caught Kerry's mistake when he referred to looking at KGB records in Treblinka Square in a visit to Russia. Treblinka was a Nazi death camp. Kerry meant Lubyanka Square."
I was wondering about that myself. Anyway, forget the minor moments of misspeaking. FactCheck.org has the debate's genuine woppers. I'll let you decide whose were worse (hint: rhymes with tush).