BK with Mojo 5-0

I've been a part of security operations for public appearances for politicians, movie stars and Fortune 500 CEOs. I've worked alongside SS. This is a colossal screw up. MAJOR questions need to be asked. If the attacker was inside the venue, there should have been multiple security layers, but everyone should have been checked for weapons. If the attacker was outside the venue, and used a sniper perch, ALL potential firing positions should have been well advanced before the event, with security/snipers covering all. I've seen would-be assassins gain entry via falsified press credentials or venue staff credentials, but a sniper from an extremely obvious firing position? Just a COLASSAL eff up on a historic/catastrophic level.