Denmark prepares for a Russian 'hybrid war' after repeated drone spottings

A sign reading "drone flying prohibited" is pictured in Halsskov, West Zealand, Denmark. Denmark banned all civilian drone flights across the country as Copenhagen hosted a European summit, after mysterious drone sightings across the country began in September.

Many Danes are rethinking their personal security, and stocking up on emergency supplies, amid unidentified drone appearances. Denmark's leaders warn that Russia is waging a "hybrid war."

(Image credit: Mads Claus Rasmussen)