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Nato's chief military commander says the international border between Ukraine and Russia is 'completely porous', with Russian-backed troops, money and weaponry flowing freely between the two countries
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General Philip Breedlove warns of renewed war as border between two countries becomes ‘completely porous’
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Kiev preparing for fresh combat operations in east after latest in a string of sightings of military movements near frontline
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Report lists 40 cases of ‘brinkmanship’ in past eight months, including near-collision between Russian spy plane and passenger jet
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Finnish PM Alexander Stubb set to meet David Cameron and other northern European leaders at conference in Helsinki
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Kiev and western powers refuse to recognise votes in Donetsk and Lugansk People’s Republics, held amid continuing fighting
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In Afghanistan the west suffered from institutional failure. Let’s learn from it