and nuclear proliferation. The Snowden breach was not without precedent at the NSA. There had been two Russian spies at the NSA during the Cold War, Jack Dunlap and David Sheldon Boone, who took a limited number of documents, but no one since the end of the Cold War is known to have taken a single NSA classif

and nuclear proliferation. The Snowden breach was not without precedent at the NSA. There had been two Russian spies at the NSA during the Cold War, Jack Dunlap and David Boone who took a limited number of documents, but no one since the end of the Cold War had taken a single NSA classified document. Now an i