The F-20A Tigershark was designed, built and tested by the Northrop Corporation in the early 1980's. Three prototypes were built, of which two crashed during sales demonstrations. The sole survivor was restored and now resides at the California Science Center in Los Angeles.
The F-20 was the largest commercial military project ever attempted. Designed for the export market, Northrop invested $1.2 billion in the F-20 before it was cancelled by the company after six years of sales efforts. The lack of success in sales was due to shifting political sands in Washington, and unrelated to the aircraft itself, which was the first to fully exploit the digital electronics revolution and was the most advanced aircraft of its day.

This picture was taken at the 1984 Farnborough air show it was the star of the show