How about fox news.
Here's the solution: the Bulletflight ballistics calculator, which predicts the trajectory of bullets fired from high-powered sniper rifles by taking into account half a dozen variables including wind speed, distance, outside temperature and altitude.
After digesting all the information, Bulletflight tells you where exactly on the sniper scope you should position your target in order to hit it.
The application is preprogrammed for three kinds of rifle sold by Knight's Armament Company (KAC) of Titusville, Fla., which commissioned and sells the app for $11.99 through Apple's iTunes App Store.
Among the weapons is KAC's M110 sniper rifle, which went into service with the U.S. Army in 2007. Profiles for other kind of weapons, as well as the ammunition they use, can be added manually.