A board, with a message referencing Ukraine President Petro Poroshenko, is seen outside the village of Hrabove (Grabovo) near the crash site of Malaysia Airlines Flight MH17 in Donetsk region July 21, 2014. Russia's Defence Ministry on Monday challenged accusations pro-Russian rebels were to blame for shooting down a Malaysian airliner and asked the United States to produce satellite images to support its assertions. (Photo by Maxim Zmeyev/Reuters)
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