JCS Chairman Martin Dempsey is quoting making the following statements in Buzzfeed:
"Whether the military effect would produce the kind of outcome that not just members of Congress but all of us would desire — which is an end to the violence, some kind of political reconciliation among the parties and a stable Syria — that's the reason I've been cautious, is the right word, about the application of the military instrument of power, because it's not clear to me that it would produce that outcome," Dempsey said at a lunch with reporters.
Dempsey warned that the Syrian situation isn't quite analogous to Libya just before the fall of Moammar Qaddafi, because of the Syrian army's superior air force.
"The air defense picture in Libya was dramatically different than it is in Syria," Dempsey said. "In Syria there are five times more air defense systems, some of which are high end air defense systems. The US military has the capability to defeat that system, but it would be a greater challenge, take longer, and require more resources."..
Here, from The Wall Street Journal, is a look at what our people believe Syria has in its possession, from Russia: