As a follow-up to our earlier assessment on counterintelligence problems, it is worth noting that:
Six years after arresting turncoat Robert Hanssen, the FBI remains vulnerable to espionage from within, the parent Justice Department said in a report Monday.
The reason for this, said the Justice's Office of Inspector General, is that the bureau has failed to fully adopt security measures to track suspicious behavior involving its own employees.
The danger posed by insiders cannot be over-stressed. It is one thing to keep out fairly obvious foreign agents, to trail ostensible “attachés” and fend off standard solicitations, but a talented turn-coat such as Hanssen, or more recently Montes, is a much tougher nut to crack.
By their very nature insiders have legitimate access to a wide variety of information. Their actions may seem to be entirely benign because accessing sensitive information is what they do for a living. Absent a more robust counterintelligence capability, an insider executing their mission slowly, discretely, methodically, has little worry of detection.