that it is almost afraid to talk about saucer-shaped aircraft. Last week Secretary of the Air Force Donald A. Quarles released a few well-guarded words about a vertically rising jet-craft that ...

In late June, NASA flew a rocket-powered, saucer-shaped landing technology test vehicle in the skies over Kauai, Hawaii. The Low-Density Supersonic Decelerator was carried by a high-altitude ...