The heads of the nation’s two major spy agencies on Wednesday told Congress that it’s impractical to seek warrants before tracking the global phone and Internet activities of groups like al-Qaida and terrorist sympathizers. At a U.S. Senate Judiciary Committee hearing here, CIA Director Michael Hayden (who until recently headed the National Security Agency) and NSA Director Keith Alexander urged adoption of a proposal that would grant spy agencies more power and current practices more legitimacy. Full Story