Destroying an opponent’s ability to communicate is an elementary military tactic. We examine the technologies helping Ukraine to stay connected: from SpaceX’s satellite-internet service, to shortwave radio. Also, what role is social media playing on the front line and in the information war? Alok Jha hosts.Keep up-to-date with the developing situation in Ukraine at economist.com/ukraine-crisisFor full access to The Economist’s print, digital and audio editions subscribe at economist.com/podcastoffer and sign up for our weekly science newsletter at economist.com/simplyscience.Additional audio courtesy of Radio Free Europe/Radio Liberty. See acast.com/privacy for privacy and opt-out information.