Video of a suspected terror attack in Kenya may have captured a US Navy SEAL on a secretive mission.
NASA Making ‘Sci-Fi Propulsion’ a Reality
The propulsion of choice for science fiction writers has become the propulsion of choice for scientists and engineers at NASA. The ion propulsion system's efficient use of fuel and electrical power enable modern spacecraft to travel farther, faster, and cheaper than any other propulsion technology currently available. Ion thrusters are currently used for station keeping on communication satellites and for main propulsion on deep space probes. Ion thrusters expel ions to create thrust and can provide higher spacecraft top speeds than any other rocket currently available. Learn more at http://www.nasa.gov/centers/glenn/about/fs21grc.html