Fears of Nuclear Disaster Rise as Tensions Mount Over Russian-Occupied Ukrainian Plant

Ukraine warns Russia may attack the Zaporizhzhia nuclear power plant, Europe's largest.
The UN's atomic energy agency has failed to establish a safety perimeter around the plant.
Russia demands the UN agency take steps to prevent Ukraine from attacking the plant.
A Ukrainian counterattack could threaten Russia's land bridge to Crimea.
There are concerns of a life-threatening radiation release if the plant is damaged.