Civilian Surveillance and Cyber Command Interrelated

A presidential advisory panel recommended in December that President Obama split the jobs of N.S.A. director and head of Cyber Command, which would have separated the civilian surveillance and code-breaking tasks from the development of cyberweapons and the defense of military networks.

But Mr. Obama rejected that advice before the panel issued its report, concluding that the surveillance and cyberwar functions were so interrelated that separating the jobs would set the United States back in what has become a global arms race to develop cyberweapons.