Why is it so hard to send humans back to the moon?

two massive side booster spew yellow orange fire lifting the core stage of a rocket as two main engines also ignite

Between 1969 and 1972, the Apollo missions sent a total of a dozen astronauts to the surface of the moon — and that was before the explosion of modern technology. So why does it seem like our current efforts, as embodied by NASA’s Artemis program, are so slow, halting and complex? 

There isn’t one easy answer, but it comes down to money, politics and priorities.

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