Michael Bloomberg: “If we want to save lives right now, ... there is only one thing that will stop the next copycat killer, and that is…”

The High Seas Treaty shows that the world has the will to protect the ocean. This investment will help ensure we have the way.

There's no question about that. The COP21 agreement was designed in -- to favor America because the negotiators knew that it would be very hard, if not impossible, to get through an American Congress.

It is a disaster. We have spent decades building trust and relationships, and the benefit of that is lots of people around the world, but Americans, we have not had a World War in 70 years.

There is one aspect - approach that I delete - deeply regret, the abuse of a police practice called 'Stop-and-frisk.' I defended it, looking back, for too long, because I didn't understand then, the unintended pain it was causing to young…