Remember back then we thought about al Qaeda in Afghanistan and Pakistan and a few other places? well, we've seen al Qaeda metastasize. It is now a global scourge. And you have the ascendancy of ISIL. The combination of those two groups -- their appeal to the lone wolfs and we see them acting in Belgium and in France and in Canada and the United States so the threat factors and the nature of the threats are far more complicated and far more serious today than on September 12, 2001.

I don't think there's a city that has done more and sustained a higher level of security and protection than New York City.

America is a country that will not be broken by fear. And instead, America is a country blessed with citizens marked by goodwill and great resolve.

We must also reject the false choice of liberty versus security. We can and must have both.

I think Senator Rubio is a very talented young man. But you can well imagine that I am kind of partial to governors.

Marco Rubio is a talented young man, but record trumps rhetoric.

Very interested in any technology that can help create a safer and more secure America.