Great Debate Live: Breast cancer screening

A discussion between Reuters and cancer screening specialists

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Ukraine accuses Russia of 'undisguised aggression' as rebels advance

KIEV/MOSCOW - Ukrainian President Petro Poroshenko accused Russia on Monday of "direct and undisguised aggression" which he said had radically changed the battlefield balance as Kiev's forces suffered a further reverse in their war with pro-Moscow separatists. | Video