January 30, 2016: Former US Attorney General Michael Mukasey explains how classified information is kept separate.

This photo of a secret government facility shows how information of different classification levels reside on different systems on different computers, to prevent cross over. (Credit: Director of National Intelligence and Special Security Office)

This photo of a secret government facility shows how information of different classification levels reside on different systems on different computers, to prevent cross over. (Credit: Director of National Intelligence and Special Security Office)

Mukasey is asked if classified markings on Clinton’s “top secret” emails would have been removed before being emailed to Clinton. He replies, “Well, the documents originated someplace. They didn’t drop in from Mars. The person who originated them necessarily put classified markings on them… Now how did the markings get off? […] [There] is very particular language relating to the fact that there are three communication systems within the government. Non-secure, SIPR [Secret Internet Protocol Router Network or SIPRNet] or secure, and the highest, which is JWICS [Joint Worldwide Intelligence Communications System]. The information from SIPR and from JWICS cannot move on the low end system, and if you put anything on there that’s got those markings on it, it essentially sets off an alarm that alerts people involved with security.”

He concludes, “[I]f she has signals intelligence or information from a human source that is obviously confidential and secret and relates to intelligence activities of the United States abroad, she’d have to have been a low grade moron in order to not know that it’s classified.” (CNN, 1/30/2016)