Not happy with the outstanding exploits of their hypersonic X-15, North American began to prepare bold higher performance “by-products”. One of the most stunning was this delta-wing variant powered by a pair of ventral scramjets. Stylish to the nth degree, this “starship” was equipped also with a pair of ultra-cool retractable canards (clearly seen near the cockpit area) used from trim purposes during both transonic and low-supersonic flight phases.
The future was then…. I know, I repeat myself.