Finland shares a lengthy border and a complicated history with next door Russia. Having been invaded by the Soviet Union in 1939, Finns have always taken the threat posed by their powerful neighbour seriously. A historically neutral nation, Putin’s war in Ukraine is testing their cautious stance on Russia and has dramatically shifted public opinion – and now for the first time, a majority of its citizens are demanding NATO membership. Robert Peston reports • Subscribe to ITV News on YouTube: http://bit.ly/2lOHmNj • Get breaking news and more stories at http://www.itv.com/news Follow ITV News on Facebook: https://www.facebook.com/itvnews/ Follow ITV News on Twitter: https://twitter.com/itvnews Follow ITV News on Instagram: https://www.instagram.com/itvnews/