Report Warns of Threat of Loose Missiles in Syria A new report says the Syrian government's weapons stocks could pose a threat to civil aviation if they fall into the hands of terror groups. The report is by the Federation of American Scientists, a Washington think tank that focuses on science and security. It warns that some opposition factions inside Syria are already wielding small numbers of anti-aircraft launchers in combat against Syrian government forces. The group cites video and photo evidence from opposition forces, media and official accounts. U.S. officials have estimated the Syrian government has as many as 20,000 man-portable air-defense systems, known as MANPADS - compact missile launchers with the range and explosive power to attack low-flying planes and helicopters.