AMMAN - The United States and Jordan have launched a 12-day military exercise with scenarios ranging from border security to counter-terrorism and for the first time a simulated chemical incident.

The Eager Lion drill started Sunday, a day after the U.S., France and Britain launched missiles at Syrian military targets in response to an alleged chemical weapons attack near Damascus a week ago.

Simulated Chemical Incident Part of Jordan-US Military Drill

Maj. Gen. Jon Mott, the director of Exercises and Training at the U.S. Central Command, told reporters that a mobile laboratory team will respond to a simulated chemical incident.

Simulated Chemical Incident Part of Jordan-US Military Drill

He said that it's a "threat all too real, as we've seen recently in Syria."

Simulated Chemical Incident Part of Jordan-US Military Drill

More than 7,000 troops, including 3,500 U.S. service members, are participating in the annual drill, the U.S. military's largest and most complex in the region.