Russia-Ukraine war live: hundreds of thousands without water or power; Russia warns of battle for Kherson in ‘very near future’

Russian president says four Ukrainian regions occupied by Russia will be put under martial law

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If you look hard enough, you'll spot faded yellow signs proclaiming fallout shelter" around New York City. They are remnants of a cold war programme that signalled spaces within ordinary buildings - from schools to banks to the Brooklyn Bridge - with adequate supplies and walls thick enough for riding out a nuclear blast safely.

Many of these windowless shelters housed little more than rats and sewage before the practice was terminated in 1979. In 2017, the city's department of education ordered the misleading" signs removed from its buildings, but many others remain - vestiges of nuclear fears that never materialised.