Stepan Bandera: Ukrainian hero or Nazi collaborator? The Mariupol fighters revere him, Russian soldiers hunt his supporters. The myth surrounding Ukrainian nationalist Stepan Bandera is at the heart of Russia's assault on Ukraine. Who was he? "Bandera is our father, Ukraine is the mother. We will fight for Ukraine!" sings a young woman in camouflage uniform, carrying a machine gun, in a video that Ukrainian defenders in Mariupol shared on social networks in early May. The video seems to have been recorded in a bunker at the Azovstal Steelworks, the city's last stand for Ukrainian resistance to Russian troops. "Azov"...