I told this story before, but I will tell it again. When I was in Saudi for British Aerospace in the late seventies, the Saudi airforce had american F5s and Lightnings. One day they decided to see what was fastest in a climb and an F5 and Lightning were placed side by side on the runway. The F5 let the brakes off on max power and max climb. When it was at 10,000ft - the lightning let the brakes off - when the F5 was at 20,000 ft - the lightning was at 30,000ft. WHAT A MACHINE.