Nato accuses Russia of a "blatant violation" of Ukraine's sovereignty, saying it is engaged in direct military operations to support rebels.
A contraction of 0.6% in Brazil's economy between April and June, and a revision of the first quarter, has pushed the country into recession, latest figures show.
Russian President Vladimir Putin has compared Ukrainian military tactics to those used by German Nazi forces during the Second World War invasion of the Soviet Union.
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Three decades ago it wasn’t unusual for older acts to find success in the pop charts - but that is no longer the case. Greg Kot explains why.