Investigation into Malaysia Airlines Flight 17

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A guard rides on a train carrying the remains of victims of Malaysia Airlines MH17 downed over rebel-held territory in eastern Ukraine as it arrives in the city of Kharkiv, under Kyiv's control, July 22, 2014.

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Police officers secure a refrigerated train loaded with bodies of the passengers of Malaysian Airlines flight MH17 as it arrives at a Kharkiv factory for a stop, July 22, 2014.

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An armed pro-Russian separatist stands guard as OSCE monitors and a team of Malaysian air crash investigators inspect the crash site of Malaysia Airlines Flight MH17, near Hrabove, Ukraine, July 22, 2014.

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A Malaysian air crash investigator inspects the crash site of Malaysia Airlines Flight MH17, near the village of Hrabove, Ukraine, July 22, 2014.