Going with the gut

This will show up on Colbert next week: Homeland Security chief warns of 'Increased risk’: Chertoff bases 'gut feeling' on history, al-Qaeda statements.

"Summertime seems to be appealing to them," he said of al-Qaeda. "We do worry that they are rebuilding their activities."

Still, Chertoff said there are not enough indications of an imminent plot to raise the current threat levels nationwide. And he indicated that his remarks were based on "a gut feeling" formed by past seasonal patterns of terrorist attacks, recent al-Qaeda statements, and intelligence he did not disclose.