Carl Bildt, co-chair of the European Council on Foreign Relations and former prime minister of Sweden, shares his perspective on European politics (this week from Stockholm).

Will recent drone attacks in Moscow lead to Russian escalation in Ukraine?

I think there's nervousness in Moscow. The drone attacks have been, Putin was trying to play down. He couldn't do very much else. He said our defenses are working, but nothing was perfect. I think there's also nervousness on what might happen on the battlefront. What are Ukrainians up to? Will there be some sort of success in some sort of Ukrainian offensive? A nervous mood, we don't know. The inclination of Putin is always to escalate whenever he can.