BALAD AIR BASE, Iraq -- Senior Airman Ryan Jackson, an aerospace medical technician at the Contingency Aeromedical Staging Facility, checks an echocardiogram machine in an ambulance here. The machine, commonly known as an EKG, uses ultrasound techniques to provide multi-dimensional imaging of the heart. Airman Jackson is deployed from Langley Air Force Base, Va. (U.S. Air Force photo/ Master Sgt. John Nimmo, Sr.)