Western spies fear CIA - FBI purge could make agencies 'vulnerable to Russia and China' / Justice Department, FBI bracing for more firings amid Trump changes / Susan Collins: 'Troubling' that Hegseth FBI report omitted key information / New Orleans truck attacker acted alone, was inspired by Daesh: FBI / FBI investigates New Orleans attack as terrorism, Las Vegas motive remains unclear / 'No definitive link' between New Orleans attack, Las Vegas explosion: FBI / No definitive link between New Orleans attack and Las Vegas explosion, FBI says / Terrorist behind New Orleans attack acted alone, reversing earlier FBI claims / New Orleans attacker behind NYE rampage acted alone, FBI says / New Orleans attack suspect acted alone, supported Islamic State: FBI