How realistic is the plan to build a 'drone wall' against Russia?

Drones have been found across Western Europe near airports, military bases and power plants, as part of a suspected programme of 'hybrid warfare'

Watch LiveBritish Broadcasting CorporationHomeNewsSportBusinessInnovationCultureArtsTravelEarthAudioVideoLiveDocumentariesHomeNewsIsrael-Gaza WarWar in UkraineUS & CanadaUKUK PoliticsEnglandN. IrelandN. Ireland PoliticsScotlandScotland PoliticsWalesWales PoliticsAfricaAsiaChinaIndiaAustraliaEuropeLatin AmericaMiddle EastIn PicturesBBC InDepthBBC VerifySportBusinessExecutive LoungeTechnology of BusinessFuture of BusinessInnovationWatch DocumentariesTechnologyScience & HealthArtificial IntelligenceAI v the MindCultureWatch DocumentariesFilm & TVMusicArt & DesignStyleBooksEntertainment NewsArtsArts in MotionTravelWatch DocumentariesDestinationsAfricaAntarcticaAsiaAustralia and PacificCaribbean & BermudaCentral AmericaEuropeMiddle EastNorth AmericaSouth AmericaWorld’s TableCulture & ExperiencesAdventuresThe SpeciaListTo the Ends of The Earth EarthWatch DocumentariesNatural WondersWeather & ScienceClimate SolutionsSustainable BusinessGreen LivingAudioPodcast CategoriesRadioAudio FAQsVideoWatch DocumentariesBBC MaestroLiveLive NewsLive SportDocumentariesHomeNewsSportBusinessInnovationCultureArtsTravelEarthAudioVideoLiveDocumentariesWeatherNewslettersWatch LiveMysterious drones have been spotted at night at airports across Europe. How worried should we be?2 days agoShareSaveFrank GardnerSecurity correspondent ShareSaveBBCFirst comes the warning, that disembodied voice over the tannoy: "Your attention please. Air siren in the city. Please move to the shelter on the minus second floor." Then comes the mosquito-like whine of the incoming Russian drones, massing in their hundreds just above the clouds.

It's followed immediately by the rattle of anti-aircraft fire, the distant thud of explosions, then finally the ominous klaxon call of ambulance and fire sirens.

This is the grim reality of night time in Kyiv and other cities across Ukraine.

These are attack drones that explode on impact.

Drones are now an integral part of modern warfare, but they are not confined to the battlefield.