Palin lied about visiting Ireland as part of her foreign policy experience

She didn't visit Ireland, which is what the McCain-Palin campaign claimed to Politico's Ben Smith on Saturday. She had a short refueling stopover, which means at best her extensive Irish diplomacy amounted to buying a sweater and a beer mug in the Shannon airport.

Why does Sarah Palin's duty-free-diplomacy matter? Because John McCain, who is 72 and has had 4 bouts of cancer, just picked Sarah Palin to replace him as commander in chief should he die or be incapacitated in office.
Sarah Palin, in an effort to bolster her non-existent national security expertise, claimed she had visited 3 countries: Germany; Kuwait; and Ireland. Now we find out that one of those three, 33% of her experience, was pretty much a lie. Did the McCain campaign know that Palin basically lied to the media and the American people? Or did this Irish blogger do the vetting that the McCain campaign couldn't be bothered to do?