In 1987, former U.S. Marine sniper Craig Roberts, a seasoned veteran of the Vietnam war, stood for the first time at the 6th floor "Sniper"s Nest" window of the Texas School Book Depository. As he looked down into what the U.S. government maintains was the kill zone used by Lee Harvey Oswald, he immediately knew that the Warren Commission"s verdict - that Oswald, acting alone from that position, fired three shots in 5.6 seconds from a bolt-action rifle, with a fatal head shot being the last shot fired - was a lie.