 could have gone unnoticed by law enforcement. Of course, now we know that it was not completely unnoticed. The Secret Service Chief Cheadle struggled to explain this week how the gunman was able to clamber atop the building where police snipers had been positioned inside instead of on the roof. That building in particular has a sloped roof at its highest point, she said. And so, you know, there's a safety factor that would be considered there that we wouldn't want anybody to put somebody on a sloped roof.