I agree, this was a good episode, much better than I was expecting it to be. I thought this looked like a below average leg from the information we had and it was good to be surprised.
I thought the trivia questions were fairly tough. Ronald Reagan made his speech about tearing down the Berlin Wall all at least 25 years ago and Kennedy made his "Ich bin ein Berliner!" statement over 50 years ago. Since most of the racers are under 30 or just over it, they probably weren't old enough to remember them. I'm not sure those speeches get much coverage in schools these days. I knew the first two questions in the Ford because I'm over 40 and have a bit of an interest in history and politics, but for the third question, I would have had to guess about where it was said.
As for the Kennedy statement, I knew that one because I had heard that to the people of Berlin, they don't call themselves Berliners. A Berliner is what they call a jelly filled doughnut. So, when Kennedy tried to say "I am a Berlin citizen!", it came out as "I am a jelly filled doughnut!" I thought that was funny, so I remembered it. I wouldn't expect most people to know that and remember the line. Good story, however I looked it up in Wikipedia just now and it says that the statement is grammatically correct and that my remembered story was wrong.
By the time Mona went to the bar to ask who said the statement after all the earlier teams had done so, I half expected it to go like this:
Mona: "Who said ..."
15 or 20 bar patrons: "John F. Kennedy!"