 I worked with Bill O'Rourke, who was the head of the Presidential Counter-Sniper Protection Detail. After describing a bit more about his background and developing a particularly useful round for the Secret Service and some of their snipers, he goes on to note that the snipers that work for the Secret Service are different in so many respects from other snipers that work for various police departments around the country. In particular, they are not in hostage situations typically like a lot of snipers are utilized.