that the ukrainian officials were citing a buk missile, surface-to-air missile taking it down. at the time we knew russia that them. we weren't sure if the separatists had them. fox news has now confirm through many different sources sources r own video evidence they do have access to these vessels and even posed next to them in recent days. >> reporter: nature. we found a deleted tweet from the donetsk republic, the twitter happen of the russian separatists operating in eastern ukraine and shows very clearly those four missiles on the back of that mobile missile launcher, known as a buk. it's made in russia. also, very significant to point out, shepard, the sanctions applied to eight russian defense firms yesterday by the white house, by the u.s. state department, include a russian defense contractor and they make