The F-15 given serial number 71-0290 had ... a testbed for the F-15E strike eagle, a technology demonstrator, and even a NASA research aircraft for several programs at the same time as the F16XL.

Pilot and weapon systems officer The two-seater version of the F-15 Eagle, the F-15E Strike Eagle is one of the U.S. Air Force’s most successful -- and deadly -- tactical ground attack aircraft ...