Russia has unveiled chilling pictures of its largest ever nuclear missile, capable of destroying an area the size of France.

The RS-28 Sarmat missile, dubbed Satan 2 by Nato, has a top speed of 4.3 miles (7km) per second and has been designed to outfox anti-missile shield systems.

The new Sarmat missile could deliver warheads of 40 megatons — 2,000 times as powerful as the atom bombs dropped on Hiroshima and Nagasaki in 1945.

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