You are part of the first generation of officers to begin your service in a world where the effects of climate change are so clearly upon us. Climate change will shape how every one of our services plan, operate, train, equip, and protect their infrastructure, today and for the long-term.

It was the call of workers who organized; women who reached for the ballot; a President who chose the moon as our new frontier; and a King who took us to the mountain top and pointed the way to the Promised Land. Yes we can!

I would say of all the things that have happened during the course of my presidency the knowledge that you have hundreds of thousands of people who have been killed, millions who have been displaced, [makes me] ask myself what might I have done differently along the course of the last five, six years.

Obama said if elected his government would "harness technology to confront the biggest challenges that America faces".

There's something about these steps [in Oval Office] and thinking about everybody who's walked here and all the business that's been done here.

Together, we're going to finish the job we started.

It is important to combine structural reforms and good fiscal stewardship with a growth strategy, because when your economy's growing and more revenue's coming in, that helps relieve debt.