How to use Lockdown Mode: The extreme iPhone security feature that foiled even the FBI ...

According to the superintendent and JCSD, the lockdown has now been lifted. No imminent threat was found on campus. A heavy law enforcement presence remains at the school as a precaution.

District leaders said the lockdown was precautionary and there is no threat.

A little known security feature on iPhones is in the spotlight after it stymied efforts by U.S. federal authorities to search devices seized from a reporter. Apple’s Lockdown Mode recently prevented ...