Because of new technologies, new wealth, new conditions of domestic life and of international relations, unprecedented criteria and issues are coming up for national decision.

The objective of nuclear-weapons policy should not be solely to decrease the number of weapons in the world, but to make the world safer - which is not necessarily the same thing.

There was no race - but to the extent that there was an arms competition, it was almost entirely on the Soviet side, first to catch up and then to surpass the Americans.

From a scientific perspective there is some indication that a nuclear war could deplete the earth's ozone layer or, less likely, could bring on a new Ice Age - but there is no suggestion that either the created order or mankind would be destroyed in the process.

I didn't actually know what a vegetarian was until I was 13 years old. I know in this day and age it's hard to believe that, but I think because I grew up on a farm, I wasn't indulged in magazines, newspapers, Internet, television. And so, for some reason, I was never exposed to what a vegetarian was.

The invisible pieces of code that form the gears and cogs of the modern machine age, algorithms have given the world everything from social media feeds to search engines and satellite navigation to music recommendation systems.

Everything is fraught with danger. I love technology and I love science. It's just always all in the way you use it. So there's no - you can't really blame anything on the technology. It's just the way people use it, and it always has been.

Our nation's military is effective because it is nonpartisan, relies heavily on science and technology, and takes the world as it is, not as it wishes it to be.