Some fact checking on Tuesday's debate:

Republican John McCain expressed incredulity that Democrat Barack Obama would tip off the enemy by saying publicly that he'd attack al-Qaida in Pakistan under certain conditions.

But McCain took the same position as Obama, a year ago, when he said, "Sure. We have to," when asked if he'd go after Osama bin Laden in Pakistan.

Both candidates stretched facts, sometimes past the breaking point.

One of the night's sharpest exchanges was over what should be done if the U.S. knew the whereabouts of bin Laden and his terrorists in sovereign Pakistan, and Pakistani officials were unable or unwilling to strike. Obama repeated that he'd attack across the border in that instance.

"Sen. Obama likes to talk loudly,' McCain said in response. "In fact, he said he wants to announce that he's going to attack Pakistan. Remarkable."

McCain went on: "I'm not going to telegraph my punches, which is what Sen. Obama did. And I'm going to act responsibly, as I have acted responsibly throughout my military career and throughout my career in the United States Senate."

In an October 2007 interview with Military Times, however, McCain's position was indistinguishable from Obama's.

Asked if "you'd go get him" if U.S. forces had a fix on bin Laden in Pakistan, McCain said: "Sure. Sure. We have to, and I'm sure that after the initial flurry, that whoever our friends are, wherever he is, would be relieved because, as I mentioned to you before, he's still very effective in the world, very, very effective."

McCain broadened that threat to say he'd target the Taliban operating in Pakistan, too: "I think that if we knew of al-Qaida — more specifically Taliban, it's mainly Taliban that are operating in these places — that we have to do what's necessary. We don't have to advertise it. We don't have to embarrass or humiliate the Pakistani government."

OBAMA: Said McCain's proposal to give people a tax credit in exchange for treating employers' health insurance contributions as taxable wages amounts to "what one hand giveth, the other hand taketh away."

THE FACTS: Obama's suggestion that McCain's health care plan is a wash for families is misleading. McCain offers families a $5,000 tax credit to help them buy health insurance. The Tax Policy Center estimates that McCain's plan would increase the federal deficit by $1.3 trillion over 10 years, meaning it is a true tax break.