NASA has hit a comet with an impactor, during the Deep Impact mission. The goal of that mission was to study the surface by making a crater and stirring up the surface material so it could be studied.

I think Dawn has done an amazing job showing that asteroids aren't just hunks of rock. They're worlds - they're places an astronaut can explore. I think the Rosetta mission also did an amazing job of that.

NEOWISE has two goals: One is to characterize asteroids, figure out how big and how bright they are, really basic information about these bodies; and we also find asteroids.

Changing the asteroid's velocity changes the time when the asteroid crosses Earth's orbit. After all, just because it crosses Earth's path doesn't mean there is necessarily going to be a collision. It has to cross Earth's path when the Earth is right there.

That was clearly surprising, interesting - a very interesting milestone was when you can pick up a magazine and read an article about some sort of computer related thing and they mention the word internet without explaining it.

Congress will pass a law restricting public comment on the Internet to individuals who have spent a minimum of one hour actually accomplishing a specific task while on line.

Russia has conducted a coordinated cyberattack on state election systems and hacked critical infrastructure. They have used social media to sow chaos and discord in our society. They have beaten and harassed U.S. diplomats and violated anti-proliferation treaties.

One thing I want to do is get Silicon Valley to think harder about those who have been left behind by the technology revolution. It has created huge winners for those who are able to understand it and are adept at it. But it has also displaced a tremendous number of jobs.