It was a Russian airplane that was bombed over the Sinai Peninsula. When the Russians conduct air strikes on IS, they are doing so because they too are threatened by terror.

It was clear to me that the White House's solemn atmosphere would not civilize Trump. But the merciless nepotism with which he conducts politics, in which he places himself and his family above the law, I wouldn't have considered that possible. And on top of that there is this reduction of complex political decisions to 140 characters. When it comes to a U.S. president, I consider the reduction of politics to a tweet to be truly dangerous. Trump is a risk to his country and the entire world.

Complementing the nation-state as it reaches its limits amid globalization: That is what Europe must offer.

We need a big debate in society about how we are going to shape Europe and tame capitalism. A government must provide direction and make concrete proposals. It is one of Angela Merkel's biggest failings that she doesn't do this.

I believe that the majority of people in Europe want to demonstrate solidarity with the refugees.

One of the richest and largest markets in the world, Europe can set global standards. And if a French president is prepared to at least consider clear rules in the Eurozone, then it would be fatal if Germany were not to react.

I would never attack somebody only because they belong to a different party.