Voters are heading to the polls today in Pennsylvania for the closely watched Democratic primary between Senators Barack Obama and Hillary Clinton. On Monday, Clinton unveiled a new television ad invoking Pearl Harbor and Osama bin Laden in an attempt to question whether Obama is ready to be president. The ad features the first image of bin Laden to be used in a TV ad this political season.

Narrator: “It’s the toughest job in the world. You need to be ready for anything, especially now with two wars, oil prices skyrocketing and an economy in crisis. Harry Truman said it best: 'If you can't stand the heat. get out of the kitchen.’ Who do you think has what it takes?”

Hillary Clinton: “I’m Hillary Clinton, and I approved this message.”