"My first inclination is to be a bit skeptical about the claims that human-produced carbon dioxide is the direct contributor to global warming."

"I'm not in favor of just taking short-term isolated situations and depleting our resources to keep our climate just the way it is today."

"I really hate to be put in the position of trying to justify something, a decision that was made. I'm a military guy: when a decision is made, I go along with it, whatever the manufactured controversy and criticism."

"To me, money is a commodity that a person must have to function, not a goal in itself."

"I understand that Detroit was a pretty rough place to grow up in the '70s and '80s."

"People come up to me and say, 'It's too bad the space program got canceled.' This is not the case, and yet that is what most of the public thinks has happened."

"America can take man to the moon, and America can take men to Mars - and beyond."

"People communicate in Twittering ways. I've learned how to do that."

"American greatness was elevated significantly after Sputnik."

"Extraordinary observations require extraordinary evidence."

"The way I see it, what is going to come out of the moon activities is a respect for U.S. leadership."

"There should be an international lunar base. That is certainly doable."

"Heavy lifting doesn't need to be heavy spending if we do the job right."

"With his deeds, not only words, President Obama has revitalized our struggling space program."

"Having walked on the Moon, I know something about what we need to explore, really explore, in space."

"NASA needs to focus on the things that are really important and that we do not know how to do. The agency is a pioneering force, and that is where its competitive advantage lies."

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

"Mars is much closer to the characteristics of Earth. It has a fall, winter, summer and spring. North Pole, South Pole, mountains and lots of ice. No one is going to live on Venus; no one is going to live on Jupiter."

"I feel we need to remind the world about the Apollo missions and that we can still do impossible things."

"Tang sucks."

"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 Earthlings being able to experience the transformative power of space flight."

"Ray Bradbury is one who is contributing to the understanding of the imagination and the curiosity of the human race."

"Pascal Lee is a true pioneer of Mars exploration."

"Astronauts are not superhuman. They lead ordinary lives and have varied personalities."

"The way I see it, commercial interests should manage a lunar base while NASA gets on with the really important task of flying to Mars."

"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-Sputnik days and getting to the moon."

"My Sunday mornings are spent in a recovery meeting in Pacific Palisades."

"Everyone who's been in space would, I'm sure, welcome the opportunity for a return to the exhilarating experiences there."

"Certainly, I've never wanted to live on past achievements."

"We need the next generation to be motivated and to push technological boundaries, to seek out new innovations."

"You can tell I'm not too bashful about some of my feelings."

"When we get there, if we don't find any life on Mars, from that point on there will be life on Mars because we'll bring it there, whether it's germs and leftover urine bags, whatever it is."

"Who put their foot in the Missouri River first: Lewis or Clark? Who cares!"

"Absolutely the United States should lead in space, for the survival of the United States. It's inspiring for the next generation. If we lose leadership, then we'll be using Chinese capability to inspire Americans."

"I suggest that going to Mars means permanence on the planet - a mission by which we are building up a confidence level to become a two-planet species."

"Exploring Mars is a far different venture from Apollo expeditions to the moon; it necessitates leaving our home planet on lengthy missions with a constrained return capability."

"I think it's inevitable that there will be Earthlings establishing a presence on Mars. And I would say that it would certainly take place by 2050 or shortly thereafter."

"Let's not spend resources that we don't need to be sending astronauts back to the moon. Let's not spend expensive resources on bringing people who have reached Mars back again. Prepare them to become a growing colony."

"The best way to study Mars is with two hands, eyes and ears of a geologist, first at a moon orbiting Mars... and then on the surface."

"Space is not just going up and coming back down again. Space is getting into orbit and being there, living there, establishing a presence, a permanence."

"My own American Dream was to serve my country as best I could and make a difference in America - and in the world."

"My first biography written in '73 was not 'Journey To The Moon.' It was 'Return To Earth.' Because for me, that was the more difficult task - disappointment."

"I grew up in New Jersey and never went up the Statue of Liberty."

"Space tourism is a logical outgrowth of the adventure tourist market."

"I am Buzz Lightyear!"

"Kids, help your parents if they don't know how to use a smartphone."

"I'm in favor of changing the destination of humans. There are a lot of manned missions that can be done, but not in the direction of the moon."

"Is the destiny of the human species to sit back and play with our mouse and computer and imagine, fantasize?"

"A mind concerned about danger is a clouded mind. It's paralyzing."

"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 you home."