My hope is Donald Trump makes things better. And if he does, we'll all benefit from it.

There are a lot of very religious scientists around. I think the problem here is that in our school systems, and to some degree - and this is where it is relevant - with school boards around the country that are mandating curriculums and textbooks, you start seeing this weird watering down of scientific fact so that our kids are growing up in an environment - and this connects to what I was saying earlier abou the media - where everything's contested. Where nothing is true.

For me and Michelle, this visit has therefore held special meaning. Throughout my life, including my work as a young man on behalf of the urban poor, I have always found inspiration in the life of Gandhiji and in his simple and profound lesson to be the change we seek in the world. And just as he summoned Indians to seek their destiny, he influenced champions of equality in my own country, including a young Martin Luther King

I think the Turks' willingness to take seriously action on the borders to stop the flow of foreign fighters joining ISIL is significant.

We have to all shoulder the responsibility for keeping the planet habitable, or we're going to suffer the consequences - together.

Fourth, we will continue providing humanitarian assistance to innocent civilians who have been displaced by this terrorist organization. This includes Sunni and Shia Muslims who are at grave risk, as well as tens of thousands of Christians and other religious minorities. We cannot allow these communities to be driven from their ancient homelands.

In recent years, we've become enamored with our own past success. Lulled into complacency by the glitter of our own achievements. We've become accustomed to the title of Military Superpower, forgetting the qualities that got us there. We've become accustomed to our economic dominance in the world, forgetting that it wasn't reckless deals and get rich quick schemes that got us where we are, but hard work and smart ideas, quality products and wise investments.