Craig Stevens

We didn't talk about the decision at all, which was great, just to get together as friends. The only thing he said to me was 'It's your decision. Just do what you have to do and I will back you 100 per cent.

When assumptions were made that I was going to bail out there was a little part of my brain that thought 'I am going to do to prove them wrong'. In the end that wouldn't be coming from my heart and doing what was right.

With political will and strategic initiatives, we can prevent more and more of our global neighbors from falling into the abyss of poverty and instead give future generations the opportunities they need to rise to their fullest potential.

Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make it pay off - Moon bases are expensive, and just buying more rockets to launch fuel from Earth is relatively cheap.