The story no Hollywood scriptwriter could make up: He spent 491 days stranded in the kill zone under Russian fire - and had to amputate one of his legs. Then he became the first soldier ever evacuated from a battlefield by a drone...

After enduring 491 days in the kill zone and forced to amputate his right leg with a blunt knife after losing his left to frostbite, Kostiantyn Vlasenko received the call he thought might never come.