Pakistani border troops allegedly foiled a US raid on Pakistani territory Monday. Details of the incident remain unclear, but according to an anonymous Pakistani intelligence official, the troops fired warning shots at American helicopters near the border after US soldiers got out of them and tried to cross into Pakistan. The US military has denied the operation. This follows weeks of strikes by American Predator drone aircrafts and prompted an outcry inside Pakistan. We speak with Tariq Ali, whose new book, The Duel: Pakistan on the Flight Path of American Power, takes a new a look at Pakistan and its fraught relationship with the United States. [includes rush transcript]