We're taking the long view on Europe's energy headache. For decades, Russia has been using its vast natural gas reserves as a powerful political tool. So what can the past teach us about the current crisis? Vivienne Nunis speaks to the author and journalist Oliver Bullough who's been following the gas trail from the USSR to Russia's invasion of Ukraine. Also in the programme, Ajit Niranjan reports from the German coastal resort of Lubmin, where the Nord Stream pipelines transporting Russian gas to Europe come to an end. What do people there make of a future without Russian gas? Producer: Carmel O'Grady. Image: Part of the Nord Stream 2 pipeline. Credit: Getty Images