Researchers at a Washington-based think tank have noticed that a funny thing happens whenever Russian President Vladimir Putin gets close to a harbor: The GPS of the ships moored there go haywire, placing them many miles away on the runways of nearby airports. According to a new report by security experts with the group C4ADS, the phenomenon suggests that Putin travels with a mobile GPS spoofing device and, more broadly, that Russia is manipulating global navigation systems on a scale far greater than previously understood. “Russia continues to act as a pioneer in this space, exposing its willingness to not...