Norwegian oil and gas workers normally don’t see anything more threatening than North Sea waves crashing against the steel legs of their offshore platforms. But lately they have noticed a more troubling sight: unidentified drones buzzing in the skies overhead.
With Norway replacing Russia as Europe's main source of natural gas, military experts suspect the unmanned aircraft are Moscow's doings. They list espionage, sabotage and intimidation as possible motives for the drone flights.
