(CNN) -- Russian-backed separatists in Ukraine are preventing full access by investigators to the MH17 crash site, and are removing evidence, President Barack Obama said. He said this begs the question: "What exactly are they trying to hide?"
The burden is on Russia to ensure that separatists in Ukraine stop tampering with MH17 evidence and grant full access to the crash site, President Barack Obama said Monday. And if Russia continues to back the separatists, costs to Russia will only continue to increase, he said. Now is the time for President Vladimir Putin and Russia to "pivot away" from its strategy in Ukraine, he said.
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