SecDef Panetta said on Wednesday that the United States has sent military troops to the Jordan-Syria border to help build a headquarters in Jordan and bolster that country's military
capabilities in the event that violence escalates along its border with Syria.
(vid caption on YT)

Additional Info
http://www.washingtonsblog.com/2011/12/are-us-troops-deploying-on-the-jordan-syrian-border.html

"This business will get out of control. It will get out of control and we'll be lucky to live through it."
-- Admiral Painter