On the Ukraine frontline: 'Only the dead aren't afraid' – video

With tensions escalating along the border with Russia, Luke Harding visits troops in Ukraine's Donbas region to gauge the mood ahead of a possible invasion. The war here has continued since 2014, when pro-Russian separatists seized Ukrainian cities. But in recent weeks large numbers of Russian troops have gathered on Ukraine's border, while talks between Vladimir Putin and US president, Joe Biden, have not provided the diplomatic solution many had hoped for