U.S. Delegation arrives in Pakistan

Monday - 10/31/2011, 1:38pm EDT

CIA chief David Petraeus will be among an army of high-level U.S. officials with Secretary of State Hillary Clinton when she arrives in Islamabad on Thursday to ramp up pressure on Pakistan to do more to stop militant infiltration across the border into Afghanistan, several U.S. officials in Washington and the region told The Associated Press.

In a muscular show of diplomatic force, the U.S. dispatched most of its senior national security leaders to Pakistan with what several officials described as a combined message of support and pressure.