Defence Secretary John Healey said Russia "remains the most pressing and immediate threat to Britain", and added that "any ...

A Royal Navy attack submarine surfaced close to a Russian spy ship off the UK coast in an extraordinary warning to stop ...

Secretary of Defence John Healey said: "I wanted President Putin to hear this message: we see you, we know what you're doing ...

The United States is strengthening its border with Mexico. It is planned to send a thousand US troops to the border between ...

It comes after the prime minister visited Ukraine for the first time since his party's election victory in July.

Donald Trump's choice for US defence secretary has been accused of lacking the competence for the job, during a ...

Donald Trump's pick for defence secretary told US senators that damaging allegations against his integrity, including sexual ...

Sky's security and defence editor Deborah Haynes is in the Donbas where she caught up with Ukrainian marines to hear their ...

A Sky News investigation analysed footage of when Halima Abu Leil was shot in Nablus - and we noted how a blue vehicle marked ...