Armed Conflict in Syria: U.S. and International Response
http://www.fas.org/sgp/crs/mideast/RL33487.pdf
Discusses the current situation in Syria and the problems posed by the fighting including refugee flows, terrorist involvement, control of Syrian weapon stockpiles, and the spread of violence to neighboring countries like Israel, Iraq, Turkey, Lebanon, and Jordan. From the Congressional Research Service, posted by the Federation of American Scientists