An alternate history - sort of:
This was the reality - some 5 years later
And then this, 10-20 years later:
But that was over 45 years ago. After this year, the US as a nation will no longer have the ability to put people in space, and the deputy head of NASA has said that she "hopes" that Americans will return to the Moon in her lifetime. No guarantees though - and it may be as late as 2050.