America is an unlikely place - a country built on defiance of the odds; on a belief in the impossible. And I remind you of this because as you set out to live your own stories of success and achievement, it's now your turn to help keep it this way.

I actually think, when you're young, ambitions are somewhat common - you want to prove yourself. It may grow out of different life experiences. You may want to prove that you are worthy of the admiration of the demanding father. You may want to prove that you are worthy of the love of an absent father.

But the question is, do we care enough? Do we care enough to keep standing up for the country that we know is possible, even if it's hard, and even if it's politically uncomfortable? Do we care enough to sustain the passion and the pressure to make our communities safer and our country safer? Do we care enough to do everything we can to spare other families the pain that is felt here today?

The US and Australia have a lot in common. One of the things we have in common is we produce a lot of carbon.

I'll go anywhere and I'll do whatever it takes to get this done. It's too important for Washington to screw this up. Now's the time for us to work on what we all agree to, which is let's keep middle-class taxes low. That's what our economy needs. That's what the American people deserve.

With respect to Russia, my principal approach to Russia has been constant since I first came into office. Russia is an important country. It is a military superpower. It has influence in the region and it has influence around the world.

We will finish the race.