I will leave you with some videos, one of David Jensen and Gregory Peck in the Martin Caiden based movie Marooned in which the X-RV, a relative of the X-20, is launched to rescue Ironman One trapped in orbit. Caiden's novel was originally written in 1964 long before the Apollo One fire. Others gives one a behind the scenes look at building the X-20 and what a mission would have looked like if it had been built.
The X-RV launches in the eye of a hurricane from the movie Marooned.
The X-20 carries out a spy mission.
What is the X-20 Part 1 - Official USAF film.
Building the X-20 Part 1 - Official USAF film.