Terrorists continue to exploit divisions between law enforcement and the intelligence communities that limit the sharing of vital counterterrorism information.

The elections that have taken place in these countries are a reflection of the lure of Democracy, and the resilience of our men and women in uniform who helped bring freedom to many who never knew what the word truly meant.

Whenever we have had a need for a national security or public safety issue, Congress has always followed the recommendations of the White House, regardless of who is in control, giving them the resources to keep America safe and to enforce our laws.

Several professional athletes have wrongly taught many young Americans by example that the only way to succeed in sports is to take steroids.

Sometimes it's hard, when you start engaging with people on the Internet, to forget that, actually, we really don't know one another... that's something I need to learn a lot more.

I am all for cracking down on inappropriate digital behaviour. Too often the connected world is an excuse for some coward hiding behind a keyboard to bully someone else.

If cheap immigrant labor is made unavailable, employers can hire Americans at a higher wage, or replace low-wage immigrant workers with technology and automation, which will create a smaller number of skilled jobs for Americans.

I wanted to make sure that this be the first scientific and technology revolution in history in which the public thoroughly discussed all the potential benefits and all the potential harms, in advance of the technology coming online and running its course.