Space has never been more accessible.

There is a growing appetite for space tourism, and private programs like this one at the National Aerospace Training and Research Center can get pretty much anyone with money and good health ready for a ride to space.

But that's just a quick trip up and down to what's called 'sub-ortibal' space.

If we want to get to deep space, that's a whole other challenge. A human hasn't been there in over 40 years.

But NASA is looking to change that...