送交者: steven 于 2006-1-07, 17:03:53:
回答: 由 妖魔 于 2006-1-07, 05:30:47:
The program wasn't that secret, and was discontinued in 2002, I think. The NASA program was called Breakthrough Propulsion Physics (BPP) Project. It is more like study the physics and determine if things like those are possible.