Kerry: Russia 'Has Not Taken Single Step' to Ease Ukraine Crisis

U.S. Secretary of State John Kerry has accused Russia of not taking "a single concrete step" to de-escalate the Ukrainian crisis.In a blistering attack Thursday, Kerry said Russia has failed to uphold the four-party deal it signed last week to ease tensions in eastern Ukraine.He said Moscow's refusal to restrain pro-Russian separatists there will be "an expensive mistake," saying more sanctions are possible.On Friday, credit agency Standard and Poor's cut...

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