Pakistan wants to use the eight F-16 fighter jets it intends to purchase from the United States for counterterrorism operations in the nation's tribal regions, Sartaj Aziz, the adviser on foreign affairs to Pakistan's prime minister, said Tuesday. During a breakfast with reporters, Aziz said the Pakistani air force is heavily dependent on F-16s, but many of these jets acquired from the United States over the past 30 years require replacement. These planes are "a very critical part" of Pakistan's...