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Once again, a gaffe by Joe Biden has provided ad fodder for the GOP ticket. Biden's comment last weekend that if elected, Barack Obama will be "tested" by an international crisis soon after taking office is the inspiration for an aggressive TV spot released this morning by John McCain.

Over audio of Biden's comments, "Ladies And Gentlemen" (subscription) airs pictures of Venezuela's Hugo Chavez and Iran's Mahmoud Ahmadinejad, along with marching Hamas soldiers. The style of the ad -- complete with music reminiscent of a classic horror film and blurry, black-and-white images -- aims to stoke fears that a President Obama would not have the experience needed to lead a country through an international crisis. Following up on Biden's statement that "we're going to have an international crisis ... to test the mettle of this guy. I guarantee you it's gonna happen," an announcer responds: "It doesn't have to happen. Vote McCain."

A couple of days after Biden made his comments, Obama sought to clarify what his running mate was presumably trying to say. "I think that his core point was that the next administration is going to be tested regardless of who it is," Obama said. Appearing to back up the Democrat's clarification, MSNBC's First Read cites examples of recent global crises early in a president's first term, including the violence in Somalia under Bill Clinton and the 9/11 attacks under President Bush.