File photograph of a volunteer for the Ukrainian nationalist group Praviy Sektor (Right Sector) during training near Pokrovskoe, eastern Ukraine. Photograph: Fabio Bucciarelli/AFP/Getty Images With his sun-leathered face and squinting blue eyes fixed on the horizon, the silent Ukrainian sniper resembles an old sea dog, sailing his land cruiser across the rolling plains of western Ukraine. Viktor’s camouflage trousers and insignia identify him as a fighter with Praviy Sektor (Right Sector) the nationalist paramilitary group which was last year incorporated into the Ukrainian armed forces. His reputation as an ace sniper precedes him. At our second refuelling stop, I can...