Hillary Clinton’s Emails: Lawyers without Security Clearance Got Classified Information? | National Review:
"Under President Bill Clinton’s 1995 executive order, top-secret intelligence is information the mishandling of which “could be expected to cause exceptionally grave damage to the national security.” The SAP designation is added when the unauthorized disclosure of intelligence could compromise critical intelligence-gathering methods or imperil the lives of intelligence sources.
That is why access to this information is so tightly restricted, and its unauthorized disclosure is routinely prosecuted.
With that as our backdrop, let’s get two things straight."