Officials are closer to knowing what downed the Caspian Airlines aircraft: they've recovered two black boxes from the plane, which crashed Wednesday en route from Tehran to Yerevan, Armenia. All 168 people on board were killed. While the search for the third black box is still out, the two recovered boxes will be sent to Caspian's Russian headquarters for analysis. Witnesses say the plane's tail caught on fire before it crashed, 16 minutes after taking off from Imam Khomeini International Airport.
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