New satellite images and drone footage show serious damage inflicted on aircraft at several Russian airbases during Ukraine’s surprise drone strike on Sunday.

Vladimir Putin has said he will have to respond to Ukraine’s major drone attack on Russian airbases, US President Donald Trump has warned.

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It was an attack of astonishing ingenuity – unprecedented, broad, and 18 months in the making.

A second round of peace talks between Russia and Ukraine have ended without a major breakthrough, and only an agreement between the warring sides to swap more prisoners of war.

It’s hard to exaggerate the sheer audacity – or ingenuity – that went into Ukraine’s countrywide assault on Russia’s air force.

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Ukraine claims to have hit more than 40 Russian warplanes at several military airfields, in what appears to be one of the most audacious drone attacks so far on Russian aviation.

The defence review will send a “message to Moscow” about Britain’s “readiness to fight if required”, Defence Secretary John Healey has told the BBC.