资讯

National Security Journal on MSN

The Mach 6 SR-72 Darkstar Might Be the Ultimate Black Project

Rumors, factory expansion, and whispered timelines keep the SR-72 “Darkstar” idea alive, but nothing is confirmed.
Modern Engineering Marvels on MSN

Inside the SR-91 Aurora Mystery: Hypersonic Aircraft or Aviation Myth?

Few legends of aviation history enthrall like the story of the SR-91 Aurora, an alleged hypersonic plane said to have ...