The head of the UK armed forces has warned the world is entering a new nuclear age.
In a speech in London, Admiral Sir Tony Radakin accused Russia of "wild threats of tactical nuclear use" - and of carrying out "large-scale" exercises and simulated attacks against Nato countries.
He also pointed to the threats posed by Iran's nuclear ambitions and North Korea's ballistic missile programme.
Admiral Radakin said he believes the outlook is "more ambiguous and more dangerous" than ever before:
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