A Ukrainian policeman (R) walks next to 84-year-old resident Mykola (L) pushing his bicycle on a street in the frontline town of Chasiv Yar, in the Donetsk region on October 11, 2023, amid the Russian invasion of Ukraine. Explosions are near-constant in the small town, whose buildings are scored with holes from shelling.

A Ukrainian policeman (R) walks next to 84-year-old resident Mykola (L) pushing his bicycle on a street in the frontline town of Chasiv Yar, in the Donetsk region on October 11, 2023, amid the Russian invasion of Ukraine. Explosions are near-constant in the small town, whose buildings are scored with holes from shelling. / AFP via Getty Images

We go to a town in Eastern Ukraine that is close to the front lines and under constant fire. Russians are advancing in Eastern Ukraine as Ukrainian forces run low on ammunition and weapons.

Tags: Series: The Ukraine invasion, explained