The landscape of the Net has changed; that cyberfrontier of the past has become a teeming city of people, transactions, and businesses.

I've always resented the force of attraction that traps me here on Planet Earth. It makes me feel like a bug stuck to a piece of duct tape. Ever since my teenage years, when I used to read a lot of science fiction and took it much too seriously, I've dreamed of somehow reaching escape velocity. I am, you might say, anti-gravity.

When the International Space Station is finally launched, it will be fitted with special nickel-hydrogen batteries weighing a total of several tons, with a lifetime of just five years, requiring spares to be brought up from Earth at literally astronomical expense.

Scaremongering is an age-old political ritual. There are public officials who have benefited by playing up the 'hacker threat' so that they can win approval by cracking down on it.

The Internet allows foreign adversaries to attack America in new and unexpected ways. Free and fair elections are hard-fought and contentious. There will always be adversaries who work to exacerbate domestic differences and try to confuse, divide, and conquer us.

I think that everyone on the Internet has to deal with people saying negative things. It can be tough!

It would be unwise to say the least, irresponsible of us at the TSA, at the Homeland Security Department not to evolve our technology to match the changing threat environment that we inhabit.

Social media companies like Twitter and Facebook get to decide whether or not you get pertinent information about national security issues in your country.