Hunting for Hackers, N.S.A. Secretly Expands Internet Spying at U.S. Border

WASHINGTON — Without public notice or debate, the Obama administration has expanded the National Security Agency‘s warrant-less surveillance of Americans’ international Internet traffic to search for evidence of malicious computer hacking, according to classified N.S.A. documents. In mid-2012, Justice Department lawyers wrote two secret memos permitting the spy agency to begin hunting on Internet cables, […]