Three suspected U.S. drone missile strikes killed 24 militants on Friday in Pakistan's northwestern Khyber region on the Afghan border, intelligence officials said, the fourth attack in two days. The United States has widened drone attacks in Pakistan this year, but almost all of them have been in the North Waziristan tribal region, a known sanctuary for al Qaeda and Taliban militants. Attacks in Khyber are not very frequent. Analysts expect the drone strikes to continue and even increase after the Obama administration on Thursday unveiled its year-old strategy in Afghanistan, where U.S.-led NATO troops are fighting a raging Taliban...