Why performed the Trick Service fail to protect Trump from being actually shot?

.IT WAS A magnificent lapse in security: exactly how performed a sharpshooter mount an unprotected roof with a direct line of sight to Donald Trump, that was actually standing a plain 150m away? Based upon online video footage, it looks like Mr Trump was actually millimetres from fatality– saved by a lucky convert of the crown a flash before Thomas Matthew Crooks, a 20-year-old coming from Pennsylvania, fired at him. Criminals got rid of a rally-goer prior to being fatally shot themself.