Leipzig was a warning shot. Here’s what real deterrence against Kremlin terror would look like

The wave of Russian state terrorism now breaking over Europe is quite different from the leftwing Baader-Meinhof group of the 1970s. It is part of a big plan to break Nato, yet Germany (and Spain, France, and Belgium) is not taking this seriously. This sends a clear message to the Kremlin: keep attacking us, writes Edward Lucas.