Lt. Cmdr. Brad Serwer listens to a patient's lungs at the Escuela Don Bosco medical site during Continuing Promise 2011.

110516-F-CF975-075
ROCAFUERTE, Ecuador (May 16, 2011) Lt. Cmdr. Brad Serwer, a cardiologist from Olney, Md., listens to a patient's lungs at the Escuela Don Bosco medical site during Continuing Promise 2011. Continuing Promise is a five-month humanitarian assistance mission to the Caribbean, Central and South America. (U.S. Air Force photo by Senior Airman Kasey Close/Released)

110516-F-CF975-075
 ROCAFUERTE, Ecuador (May 16, 2011) Lt. Cmdr. Brad Serwer, a cardiologist from Olney, Md., listens to a patient's lungs at the Escuela Don Bosco medical site during Continuing Promise 2011. Continuing Promise is a five-month humanitarian assistance mission to the Caribbean, Central and South America. (U.S. Air Force photo by Senior Airman Kasey Close/Released)