Iran sent ‘operational trigger’ signal to activate sleeper cells after Khamenei’s death: Report | World News  Hindustan TimesAfter Khamenei’s Death, Iran Sent A Signal To Activate Sleeper Cells: Report  NDTVIran may be activating sleeper cells outside the country, alert says  abcnews.comActivate sleeper cells outside: What encrypted alert US says it has intercepted from Iran  The Times of IndiaA Mysterious Code Is Being Broadcast on Shortwave Radio. Is It Iran?  The Atlantic  Read More