After all, the same steps that reduce carbon pollution also clean the air we breathe, which saves lives and reduces disease.

If you don't encounter setbacks in your career, if you don't have doubts and disappointments , let me tell you, you're not dreaming big enough.

Even though New York is the safest big city in the nation, there are still far too many illegal guns on our streets. Nearly all of them arrive from out of state - and most are sold by a small group of rogue gun dealers who refuse to obey federal laws.

I cannot for the life of me understand why the American market keeps going up. Our economy has some real challenges. The infrastructure's falling apart. We're destroying jobs with technology. We are keeping the best and the brightest from around the world from coming to America to create new jobs and create new businesses. All of those things would give you pause to worry about the future.

I have my own army in the NYPD, which is the seventh biggest army in the world. I have my own State Department, much to Foggy Bottom's annoyance. We have the United Nations in New York, and so we have an entree into the diplomatic world that Washington does not have.

The mistake that was made in the '70s is we stopped policing the streets, we stopped cleaning the streets, we stopped cleaning the graffiti off buildings, we stopped supporting our cultural institutions and building parks and schools and all those kinds of things.

If you think of all the publicity about the terrible tragedy of Virginia Tech, we have a Virginia Tech in this country every day. It's just spread across 50 states.