The fighter was so secret that it was in service for six years before the U.S. Air Force even admitted its existence.
The exact potential of an advanced weapon system is never really known until it is tested in combat. This was certainly true of the stealth aircraft the United States developed during the Cold War—it was also the sort of weapon that most military planners would never want to see a need to be used.
Then with the dissolution of the Warsaw Pact, it might have...
Read this story at The National Interest