Afghanistan: U.S. blocking deal on future security pact -- Negotiations over the BSA, which will outline the U.S. military role in the country for the coming decade, have reached the "final, sensitive stage," Karzai's spokesman Aimal Faizi told CBS News.--- He said two issues remain in the way of an agreement with the United States. The first stumbling block is Washington's insistence that American troops maintain the right to launch offensive strikes "without limits," including missile strikes, detentions and night raids after the 2014 withdrawal, which Faizi said the Afghan government would, "clearly consider a violation of our national sovereignty." -- Secondly, the Karzai administration wants a guarantee that the U.S. military will defend the Afghan homeland from "aggression or foreign attack," but there's no agreement on what exactly those terms define. - CBSNews