[<1/1,000,000th%]

We could go to Mars in 2 weeks with nuclear engines based on the prototypes built in the ‘60’s.

[DannyTN]

"We could go to Mars in 2 weeks with nuclear engines based on the prototypes built in the ‘60’s."

My guess is the problem is the risk of getting nuclear material into space. If we could find or mine nuclear materials without risking a failed launch from earth, we could probably do that.