This video explores the reasons why, even though we managed to put a man on the moon in the span of 9 years, we haven’t gone back.  Here we also learn some key steps it took to get us there:

1. Get a Visionary
2. Have a Cold War
3. Very Large Budget
4. Work Long Hours.  Through the 60s, around 400,000 people worked to send people to the moon.  Seamstresses for space suits worked around 100 hours a week for nine years.
5. Innovate
6. The Right People at the Controls

These are the theories that Time believe it would take to put people back on the moon.  Many believe we could not do it again.
VIDEO BELOW:

Why America Hasn’t Gone Back to the Moon