Senior U.S. official : `` So the Russians on the other side of the Ukrainian border will have all of this weaponry available to them , '' he said . We saw surface - to - air missile to track aircraft . A sophisticated surface - to - air missile was more likely used , experts say . Another possibility is the Russian - made ballistic missile system , an Army officer says . The sophisticated missile would require professional soldiers , expert weapons .
Senior U.S. official : We saw surface - to - air missile to track aircraft . A sophisticated surface - to - air missile was more likely used , experts say . Another possibility is the Russian - made ballistic missile system , an Army officer says . The sophisticated missile would require professional soldiers , expert weapons .