The National Aerospace Plane program,created to design a supersonic jet that could fly payloads into space like the shuttle and also be used as a bomber to reach destinations around the world in a couple of hours,was scrapped in1994.

• "国家航空航天器"项目开始于1994年，目的是设计一种超音速喷气机，能够像航天飞机一样把负载运送到太空，还可以用作轰炸机，在数小时内到达世界上任何指定地点。