 A potential breakthrough for amputees, a bionic leg controlled by the brain. Researchers at MIT say the prosthetic allows amputees to walk more naturally and move 40% faster. Michelle Franz. You can't afford to miss the big news. Several U.S. military bases across Europe are now operating under a heightened state of security. And only one station covers it all. The high court ruling 6-3 that presidents are at least entitled to the presumption of immunity for their official acts. Your news authority.