U.S. and Western military officials are calling on Iran to help stabilize Afghanistan, but historic tensions and allegations of arming militants raise doubts about Tehran’s intent.

Pakistan is key to success in U.S.-led  counterterrorism efforts, with its tribal areas serving as terrorist havens. But covert U.S. military actions inside Pakistan put the future of the U.S.-Pakist…

Pakistan’s intelligence agency, the ISI, faces persistent accusations of links to terrorism, despite repeated denials.

The U.S. government designates Iran as the "most active state sponsor of terrorism," which feeds concerns about Iran’s growing nuclear program.