After more than two decades of traveling with American presidents and chief diplomats - on visits to places that have included some of the world's most repressive nations - I am used to watching leaders disappear behind closed doors.

When Russia's intelligence agencies obtained some of the National Security Agency's secrets about its own cyberweapons, it appeared to do so by manipulating a virus protection program sold by Kaspersky, a Russian firm.

Even China's leaders routinely let the news media pool in, though they do their best to ignore them.

David E. Sanger Quotes