Any so-called leader who does not take this issue (climate change) seriously or treats it like a joke is not fit to lead

I changed those things that were in direct - my direct control. I mean, I - look, I'm proud of the fact that, with two weeks to go, we're probably the first administration in modern history that hasn't had a major scandal in the White House.

When I talked to [Donald Trump] about - our intelligence agencies, what I've said to him is - is that there are gonna be times where you've got raw intelligence that comes in and in my experience, over eight years, the intelligence community is pretty good about saying, "Look, we can't say for certain what this means." But there are gonna be times where the only way you can make a good decision is if you have confidence that the process is working, and the people that you put in charge are giving you their very best assessments.

There is a word in South Africa - Ubuntu - that describes his greatest gift: his recognition that we are all bound together in ways that can be invisible to the eye; that there is a oneness to humanity; that we achieve ourselves by sharing ourselves with others, and caring for those around us.

We are running out of time

The issue of climate change is one that we ignore at our own peril. There may still be disputes about exactly how much we're contributing to the warming of the earth's atmosphere and how much is naturally occurring, but what we can be scientifically certain of is that our continued use of fossil fuels is pushing us to a point of no return. And unless we free ourselves from a dependence on these fossil fuels and chart a new course on energy in this country, we are condemning future generations to global catastrophe.

Entrepreneurs embody the promise of America: the idea that if you have a good idea and are willing to work hard and see it through, you can succeed in this country. And in fulfilling this promise, entrepreneurs also play a critical role in expanding our economy and creating jobs.