As Apollo hit its stride, NASA was trying to figure out what it was going to do next. The answer requires a significant amount of historical context, so let's see if we can provide it as we try to answer the question: where did the Space Shuttle come from?

Tom Stafford, Vance Brand, and Deke Slayton (yes, Deke Slayton) take the last Apollo CSM up to meet with some new friends from out of town.