I almost missed this.  Palin, as you know, complained that the question she was asked — the one that forced her to demonstrate her lack of knowledge about American history — was a "gotcha" question.

David Frum discovered the outrageous ambush question that threw Palin for such a loop:

“What have you seen so far today, and what are you going to take away from your visit?”

Yeah.  Tricky question.  Requires a Paul Revere facepalm.