 First of all, the roof was plenty not sloped enough for the actual shooter to be on the roof, pointing a gun and shooting at the President of the United States. I could navigate that sloped roof. My kids could navigate that sloped roof. But what, they were afraid of some sort of OSHA violation? If the Secret Service was up top protecting the roof, a sloped roof, are you kidding me? So the police snipers were actually inside the same building on which the shooter was lying, according to the Washington Post.