Over the past 13 months, at least 68 cargo flights from Serbia, Slovakia, Bulgaria and Czech Republic have carried thousands of tons of munitions to Saudi Arabia, the United Arab Emirates (UAE) and Jordan, three key suppliers of the Syrian rebels.

Of the 68 flights identified, 50 were officially confirmed to have carried arms and ammunition. An additional 18 flights were identified as very likely to have been carrying arms and ammunition based on one of three variables: the air freight company’s history of weapons supplies; connections to earlier arms flights; or a destination of a military airport.

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