Sighting in a target through the scope of a high-caliber rifle can be a bit more complicated then it sounds -- snipers have to account for cross-winds, range and a whole host of external factors that could put their projectile off course. It isn't easy, and the required calculations can seriously slow down a shooter's time to trigger. The solution? High tech laser-equipped sniper scopes, of course. DARPA has actually been working on this problem for quite some time, and calls its' project One Shot.
