U.S. Air Force Staff Sgt. Alex Elizondo, 99th Medical Operations Squadron cardiopulmonary laboratory craftsman, observes the catheterization laboratory's first live procedure Oct. 13, 2011, at Nellis Air Force Base, Nev. The procedure is the end-all diagnostic to test for blockages in a patient's arteries and will benefit patients with severe coronary risk factors. (U.S. Air Force photo by Staff Sgt. Christopher Hubenthal/Released)
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