Peter Pomerantsev: Big media need their Geneva convention

As Russia wages war in Ukraine, attacking not just military targets but also basic common sense with aggressive misinformation and propaganda campaign, information has become a security issue. Faced with new and quite unprecedented challenges, big media is approaching a moment when it will need to have a Geneva convention moment - get together and agree on a global self-regulation mechanism, says British journalist and author Peter Pomerantsev.