Michael
Michael asked Andy Weir:

A manned mission to Mars in the next couple of decades has been talked about by a lot of organizations (NASA for one). What do you see as the biggest roadblock that our current society has created to make this happen? And what is your best idea to change that?

Andy Weir Well the biggest impediment is the cost. I think the privatization of space travel is the solution. Things don't get cheaper until there's a reason. Space tourism will drive the cost of space travel down dramatically.
Andy Weir
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