Terrorists within the CIA?

This would be a nightmare come true...

As many as 40 possible terrorists may have attempted to infiltrate U.S. intelligence agencies in recent months, CIA expert Barry Royden reported at a national counterintelligence conference in March. If that news isn't sufficiently terrifying, consider this chilling paradox: Though the agencies caught the potential spies at the job application stage, post-Sept. 11 pressures to quickly boost staffing make it increasingly likely that a terrorist could sneak into the intelligence community's ranks.