"

I think the people who experienced the Apollo missions came away from that experience wondering to themselves, 'When can we get a chance to experience...more

"

As someone who flew two space capsules and twice landed in the ocean, I can attest from personal experience how much logistics work is needed to get y...more

"

Globalisation means many other countries are asserting themselves and trying to take over leadership. Please don't ask Americans to let others assume ...more

"

We could have human intelligence in orbit around Mars, building things there.

"

One of the major problems with long-term deep space human flight is the requirement for radiation shielding.

"

Space architectures capable of supporting a permanent human presence on Mars are extraordinarily complex, with many different interdependent systems.

"

I am excited to think that the development of commercial capabilities to send humans into low Earth orbit will likely result in so many more Earthling...more

"

My expertise is the space program and what it should be in the future based on my experience of looking at the transitions that we've made between pre...more

"

The first footfalls on Mars will mark a historic milestone, an enterprise that requires human tenacity matched with technology to anchor ourselves on ...more

"

As we begin to have landings on the moon, we can alternate those with vertical launch of similar crew modules on similar launch vehicles for vertical-...more