Iran sent out a possible “operational trigger” to activate “sleeper assets”  abroad after the war with America and Israel began, according to an encrypted message intercepted by the US. The coded signal was sent out following the death of Iranian Supreme Leader Ali Khamenei on Feb. 28, with the message appearing to hold instructions for “covert operatives or sleeper assets,” ABC News reported , citing a federal alert sent to law enforcement agencies. The message could “be intended to activate