Defense Secretary Chuck Hagel was in Pakistan Monday for talks with Prime Minister Nawaz Sharif amidst ongoing tensions over the U.S. drone war. Protests against the drone strikes forced NATO to suspend ground shipments through Pakistan last week. U.S. officials say Hagel warned Sharif the anti-drone blockades could jeopardize U.S. aid. The party of opposition politician Imran Khan, PTI, has vowed to continue the blockade until the drone strikes stop.