Based on a pitch by McDonnell Douglass for the Thunderbirds to use the F-15.
For the USA Bi-Centennial in 1976, F-15B71-291 was painted in (Most of) the
proposed Thunderbirds scheme with the T-Bird Logo replaced by the Bi-Centennial one.
Shown at events like the 1976 Farnborough International Air Show and the Japan International Aerospace Exhibition.