In the aftermath of the FBI's surprising request on Monday to postpone a hearing in its legal crusade to unlock Apple cellphones, many wondered who it was that had succeeded in penetrating the supposedly unhackable smartphone. Earlier today Reuters provided the answer: the FBI's effort is being assisted by Israel's Cellebrite, a provider of mobile forensic software, which is now helping the Feds in their attempt to unlock an iPhone used by one of the San Bernardino, California shooters, the Yedioth Ahronoth newspaper reported on Wednesday.