A few months later, cameras watch her in a New York coffee shop where she meets with someone she thinks is her Russian handler. It is really an undercover FBI agent.

A counterterrorism expert said that Iranian sleeper cells might be hiding "in plain sight" waiting to target more rural areas.

A former FBI special agent supervisor hired prostitutes while on assignments, the Justice Department ’s watchdog body has claimed. The Office of the Inspector General released an investigative ...

US warns sleeper cell threat is rising amid tensions with Iran Former FBI agent: Sleeper threats may enter through US borders Public urged to stay alert; DHS issues worldwide caution warning ...

The FBI is returning counterterrorism agents who were ordered to focus on immigration cases back to their old jobs because of concern about potential threats from Iran, four people with direct ...

NewsNation national security contributor Tracy Walder says while the concept of Iranian sleeper cells in the U.S. is not new, there may have been a recent influx of agents. Walder says they are just ...