Northrop Grumman's new Sky Viper sets up a chain gun vs. Gatling gun battle for the U.S. Army's 20mm cannon to be used on its future attack reconnaissance aircraft.
Hundreds of millions tuned in to radios or watched the grainy black-and-white images on TV as Apollo 11's Neil Armstrong and Buzz Aldrin set foot on the moon on July 20, 1969, in one of humanity's most glorious technological achievements.
The former top U.S. commander in Afghanistan said Sunday that withdrawing up to half the 14,000 American troops serving there would reduce the incentive for the Taliban to negotiate a peace deal after more than 17 years of war.