Today on MSNBC's "Hardball," which aired live at 5pm, Chris Matthews was joined by Andrea Mitchell and Chuck Todd for a discussion about Charlie Black's comment that McCain would benefit from a terrorist attack. A weary-looking Matthews accidentally referred to the "Obama headquarters" when talking about Osama bin Laden. He instantly apologized and got a word of encouragement from Mitchell. In February, a picture of bin Laden popped up on "Hardball" during a mention of Obama, which Matthews apologized for later in the program.
Watch Tuesday's slip: