Two former fighters of the Russian private military company Wagner have spoken to CNN about their experiences on the battlefield in eastern Ukraine, where they described horrific losses in “first wave” assaults reminiscent of World War I. Ukrainian forces have responded to the shelling with counterattacks, and have managed to down five drones and capture two former Wagner fighters. Despite the shelling, officials in Kyiv said that Moscow is having trouble launching its large-scale offensive in the east of the country.