>> certainly it's an ad vans over the manned portable system we seen flooding ukraine in recent months. it's most likely an sa-11 book. i think the term is a gadfly. it's been around since the late ''80s, but it's a large system. it looks like a tank with four large missiles at the top. it's got its own radar internally. >> we are seeing there a rendering of it, i believe? >> it is perfectly capable of hitting an airliner of 33,000 feet. it has an effective range up to 72,000 feet. >> does it look increasingly likely that perhaps pro-russian separatists took this plane down by mistake, that they thought it was a military transport plane? >> yes, that's almost certainly what they thought they were shooting at. a few days ago, a separatist shot down a transport plane