St3v3M Loc: 35,000 feet

http://www.theverge.com/2014/8/1/5959637/nasa-cannae-drive-tests-have-promising-results

NASA has been testing new space travel technologies throughout its entire history, but the results of its latest experiment may be the most exciting yet — if they hold up. Earlier this week at a conference in Cleveland, Ohio, scientists with NASA's Eagleworks Laboratories in Houston, Texas, presented a paper indicating they had achieved a small amount of thrust from a container that had no traditional fuels, only microwaves, bouncing around inside it. If the results can be replicated reliably and scaled up — and that's a big "if," since NASA only produced them on a very small scale over a two-day period — they could ultimately result in ultra-light weight, ultra fast spacecraft that could carry humans to Mars in weeks instead of months, and to the nearest star system outside our own (Proxima Centurai) in just about 30 years.

Adicus Loc: New Zealand

Its about time we got another kind of drive instead of using huge amounts of volatile fuel burning to provide thrust.

nairiam Loc: Bonnie Scotland

Shut down main engine - heat soup!!

houdel Loc: Chase, Michigan USA

The CIA experimented with nuclear propulsion back around the 80s as I recall. The project was dropped because the radiation fallout was considered too hazardous to earth. Might make sense for a hybrid propulsion system though - using conventional propulsion until the craft was beyond the range where the nuclear system would endanger the earth, and nuclear after that point, although the bulk of the energy expended is used in getting the craft off the earth and into space.