Sky's security and defence editor Deborah Haynes shows inside Ukraine's secret underground military headquarters in the Donbas region. The site is used by the Ukraine's Azov corps to track movements on the frontline and thwart Russian attempts to advance. #ukrainerussiawar #ukraine #russia #skynews SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews Follow us on Twitter: https://twitter.com/skynews Like us on Facebook: https://www.facebook.com/skynews Follow us on

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