Sapper Lubomyr lost his leg after stepping on a mine in eastern Ukraine last year, but is now back on the front helping to fight Russia. Soldiers like Lubomyr have returned to battle as they believe letting up now would leave the road open for Moscow's reinvigorated army, which is seeking to press its battlefield advantage. "If Russia stops shooting, it's over, the war is over. But if we stop shooting, we're screwed," Lubomyr says. IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES