Bravery comes along as a gradual accumulation of discipline.

Before deciding what to do about national space policy, Obama set up an outside review panel of space experts, headed up by my friend Norm Augustine, former head of Lockheed Martin and a former government official.

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

Sending a couple of guys to the Moon and bringing them back safely? That's a stunt! That's not historic.

Retain the vision for space exploration. If we turn our backs on the vision again, we're going to have to live in a secondary position in human space flight for the rest of the century.

Every couple of years, we could dispatch people from Earth to Mars.

Does it make sense for the U.S. to expend hundreds of billions of dollars to mount a new Apollo-style program to return to the moon? Or have we blazed that trail? Shouldn't we help other nations achieve this goal with their own resources but with our help?