The chief of the defence staff, Sir Richard Knighton, will say Russia's war in Ukraine shows that Vladimir Putin's willingness to target his neighbours "threatens the whole of NATO, including the UK".
Russia is a threat to the UK and our sons and daughters must be ready to fight, armed forces chief warns - Chief of defence ...
Sky's security and defence editor Deborah Haynes speaks with General Oleksandr Syrskyi, head of Ukraine's armed forces.
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