SRINAGAR, India — There was guarded optimism among military experts in India as Prime Minister Narendra Modi and U.S.

In the 1950s, the U.S. military envisioned a game-changing fighter jet—the Bell D-188, a vertical takeoff and landing (VTOL) ...

Decades before the world saw the F-117 Nighthawk, Germany was secretly developing its own stealth fighter—the MBB Firefly.