Keywords: US Navy 110718-N-QD416-015 Medical personnel perform an echocardiogram on a patient.jpg en ACAJUTLA El Salvador July 18 2011 Lt Cmdr Brad Serwer left and Hospital Corpsman 1st Class Benjamin Stewart perform an echocardiogram on a patient as Salvadoran medical student Alfonso Rodriguez center watches during a Continuing Promise 2011 community service medical event at the Instituto Nacional Acajutla Continuing Promise is a five-month humanitarian assistance mission to the Caribbean Central and South America U S Navy photo by Mass Communication Specialist 1st Class Brian A Goyak/Released 2011-07-18 110718-N-QD416-015 Navy http //www navy mil/view_image asp id 104360 U S Navy photo by Mass Communication Specialist 1st Class Brian A Goyak PD-USGov-Military-Navy Images from US Navy location Acajutla El Salvador |