Well, I think that when you think about the challenges we face, these are challenges that require us to look forward and not backwards. When it comes to the economy I think we have to recognize that we are now in a global economy. And that the measure of our success is: how well are we training our workers? How well are we investing in the new energy economy?
At a time when the European project is facing challenges, it's especially important to show the benefits of economic integration by continuing to invest in our people and working to reduce inequality, both within and across our countries.
I do think Brexit vote speaks to the ongoing changes and challenges that are raised by globalisation.
Whenever I look at the history of presidents I deeply admire - the one thing that I'm always struck by is persistence. It's a quality that's underrated. Being able to plough through, being able to stay buoyant in the face of challenges.
The challenge there is that ISIL doesn't have an air force, so the damage done there is not against ISIL, it's against the Syrian regime.
The Iranian people are getting restive because of the challenges that sanctions have posed to their economy.
Of course we [with Angela Merkel] discussed our commitment to meeting shared security challenges from countering cyber threats to ensuring that Iran continues to live up to the terms of the Iran nuclear deal.
When your team loses, everybody gets deflated. And it's hard, and it's challenging.