GLOBAL HEALTH Dr. S. Ward Casscells, assistant secretary of defense for health affairs, spoke to an audience at the Center for Strategic and International Studies, Jan. 7, 2009, in Washington, D.C., about the U.S. military's role in global health. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 449154-L-JFH87-439.jpg Photo Gallery