JACKSONVILLE, Fla. (Jan. 15, 2015) – Hospital Corpsman 3rd Class Joshua Knight, a cardiovascular technician at Naval Hospital Jacksonville, conducts an echocardiogram on Aviation Machinist’s Mate 2nd Class Sydney Longoria. Heart disease is the leading cause of death for both men and women in the , responsible for one in four deaths each year. ( Navy photo by Jacob Sippel, Naval Hospital Jacksonville Public Affairs/Released).

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