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

.IT WAS ACTUALLY An impressive lapse in safety and security: how did a sniper mount an unprotected rooftop with a direct line of sight to Donald Trump, who was actually standing a mere 150m away? Based on video clip footage, it seems like Mr Trump was actually millimetres coming from fatality– spared through a lucky turn of the crown an immediate before Thomas Matthew Crooks, a 20-year-old from Pennsylvania, shot at him. Crooks eliminated a rally-goer prior to being fatally shot themself.