(NBC News) Remains from the wreckage of Malaysia Airlines Flight MH-17 arrive in the Netherlands today.
U.S. intelligence officials now think the plane was shot down over Ukraine, by accident.
Russia still denies its supporters in Ukraine were involved, but the U.S. says there's plenty of evidence they were behind it.
Investigators saw the six-mile debris field for the first time Tuesday. International monitors say there's no security, and it appears some of the debris was moved or altered.
"It appeared that again that big cone section had been more or less split into two. And also there could have been possible changes to the tail fin as well," said Michael Bociurkiw of the OSCE.
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