'We've got to run': Inside ruined Ukraine power plant under constant drone threat

As peace talks between Ukraine and Russia continue, Ukrainians are facing a rolling schedule of planned power cuts because of intensified Russian attacks on their energy grid. Ukraine has responded by striking Russian oil refineries.

Officials are concerned that life will quickly become unsustainable for millions of Ukrainians if power supplies cannot be maintained for at least four hours per day. Some privately warn that's close already, as some families are living with outages of up to 20 hours in Kyiv.

Ukraine correspondent Dan Johnson visits one of the country's power stations on the front lines of the war. Devastated by a direct ballistic missile strike, repair work is hampered by hourly air raids.