Can Germany stop attacks on its key infrastructure?

What does it take to knock out parts of Berlin for days in the middle of winter — and how much do Germany’s authorities really know about who did it?

Last week, Interior Minister Alexander Dobrindt (CDU) announced an unprecedented reward: up to €1 million for information leading to the arrest of the culprits behind a major blackout that plunged parts of the capital into darkness in early January.

“We are dealing with a deliberate, highly dangerous attack on our society’s lifelines,” Dobrindt said of t…