It’s not that good. I saw it years ago on late night TV.
William Holden is the star….James Garner plays the third pilot on the left or somesuch. 🙂

Nice color shots of Edwards Air Force Base, home of the USAF Flight Test Center.
The Martin XB-51 (which lost the completion to the Canberra) is featured as a fighter prototype. Also seen is the Bell X-2 and lots of other neat stuff.