A broad base of knowledge is critically important to our ability to investigate terrorism.

I think it's only natural to want to look good. I enjoy good clothes, so 18 years ago I moved to having custom-made suits. They last longer. They fit you better. In my opinion, I think men don't spend enough on clothes.

I think I've had a long, distinguished career in public service. It just goes to show you what some politicians will do. They'll say or do anything to get elected. I know all these people. They all claimed to be friends of mine up until their mayoral campaigns. They'd call me on the phone and ask for information or come over here and sit in this chair to get briefed.

I never think of the word legacy. It doesn't mean anything. You do the right thing, in my judgment, and things will work out. That's what drives me. I'm not looking for legacy or history books or whatever. I know what we've done here has saved a significant number of lives. The burden is not on me. It's on the politicians who made the decisions to limit what we're doing. They're the ones who are going to pay a price, in my judgment, if crime significantly increases.

You can be stopped if a police officer reasonably suspects a crime is about to be committed, is being committed or has been committed. Every law enforcement agency does it. It's essential to policing.

No other agency is scrutinized like the police. Everything we do is in a goldfish bowl. We are not the most popular people in society. We do things like use deadly force; we're the bearers of bad news. We're not firefighters, who are viewed as heroic, helping people, with people loving them back. The police have a much more complex and demanding job.

If you go into any department store these days, your picture is probably taken 30 times. In London there are 500,000 cameras in public spaces. You have no expectation of privacy in public spaces.