Putin is testing NATO with GPS spoofing, sabotage, and drones, and paying nothing for it. Deterrence requires imposing costs.

It comes at a particularly fraught moment for Nato, as Russian missiles and drones repeatedly test the defences of countries along the alliance's eastern frontier.

All the signs of Vladimir Putin’s war spreading to the borders of the North Atlantic Treaty Organisation, in the space of a month. US reports on Russian tests of European…

To deter the rising threat of a Russian attack on NATO, Donald Trump should order an airborne infantry exercise in Estonia.

Putin is testing NATO with GPS spoofing, sabotage, and drones, and paying nothing for it. Deterrence requires imposing costs.