Do we need to tighten restrictions on people coming into the country? I think there's a good argument for that, but a kind of broad ban is a bad idea, and, of course, many American Muslims are great sources of information as we seek to look for domestic folks who might be engaged in trying to promote terrorist activities.

Our nation has a regrettable history of drawing down our forces and readiness after each conflict, only to find ourselve ill-prepared for the next great struggle.

NATO is the most important military alliance in world history.

Diplomacy is important, extremely important, and I don't think these reductions at the State Department are appropriate because many times diplomacy is a lot more effective - and cert cheaper - than military engagement.

It seemed like my professional life would take a more scientific route. I guess that plan started to become undone when, at the age of 17, I happened upon a screening of Alain Resnais' 'Hiroshima Mon Amour,' and it took my breath away.

Blitzscaling is what you do when you need to grow really, really quickly. It's the science and art of rapidly building out a company to serve a large and usually global market, with the goal of becoming the first mover at scale. This is high-impact entrepreneurship.

I don't believe in technological determinism, especially not in biology and medicine. We have strong laws to keep doctors from monkeying around with humans that will remain in place. It's simply not true that everything that is technologically possible gets done.

I think when science fiction is at its worst, it's just spaceships flying around shooting at each other. There has to be a lot more going on than that... science fiction is about exploring new worlds and new ideas, not about ray guns and action, necessarily.