He knows that any weapon capable of shooting down a Syrian warplane could also be used by a terrorist against a US airliner. He believes that he is doing the right thing and following the prudent course in waiting for the Syrian conflict to burn itself out in some way while minimizing the long-term risk to American lives.
每天早晨，奥巴马都会收到简报，警告他所有谋杀美国人的意图和阴谋。他知道，能够击落叙利亚战斗机的武器同样可以用来对准美国民航客机。他相信，他在做正确的事，等待叙利亚冲突自己水落石出，同时将美国人民生民安全威胁最小化，这才是审慎的战略。