After last week's "Joe the Plumber" debate, some McCain-Palin supporters dressed up as plumbers, complete wiith plungers, and held up signs that said "I am Joe the Plumber."

The crack CBS fact-checking team determined this to be false.

At least two of the members aren't quite as similar to the newly famous Joe Wurzelbacher as they might like you to think. As CBS News' Maria Gavrilovic, who is traveling with the Obama campaign, reports, the man on the right does say he's an actual plumber – though he is from Melbourne, Australia, and will thus not be casting a vote this November.

And the man on the left, plunger thrust high in the air, is Charlie Smith – the National Chairman of the College Republicans.

Having solved that little mystery. I encourage CBS News to use its journalistic resources to look into these imposters.