Summary: In the 1980s, the U.S. Air Force sought to replace the F-15 with a new fighter jet, spurring a competition between the YF-23 and YF-22. Northrop Grumman's YF-23, known for its stealth and ...

The Air Force passed on the YF-17 prototype, preferring the more agile F-16. But Navy planners liked it—ultimately ...

Credit: Illustration by Colin Throm/AW&ST based on drawings by Darold B. Cummings/ForzAero. When the U.S. Air Force announced Boeing as the winner of the Next-Generation Air Dominance fighter ...