Have you ever wondered what goes through the mind of a sniper?  Chris Kyle is the most lethal sniper in the history of the US Armed Forces, serving in the middle east from 2003-2009.  He has tallied up an estimated 255 kills.  So how do you think a person can live with all those deaths at his hands?  Just fine if you are Chris Kyle, and he explains this in his autobiography American Sniper.One of his quotes in the book is "Every person I killed I strongly believe they were bad."  Also, what about when he faces god?

"Every person I killed I strongly believe that they were bad," he says. "When I do go face God there is going to be lots of things I will have to account for but killing any of those people is not one of them."

He also describes his first target, which was a woman who was carrying a grenade.  You can read more about this sniper and about the book on the BBC News website.