180222-N-LT007-0769 LAREDO, Texas (Maech 22, 2017) Capt. Thomas C. Herzig, commanding officer of Naval Medical Research Unit - San Antonio (NAMRU-SA) speaks to more than 250 high school students during the 8th Annual STEM (Science, Technology, Engineering, and Math) Alliance Symposium luncheon, Feb 22, 2018 at Texas A&M International University in Laredo, Texas. (U.S. Navy photo courtesy of NAMRU-SA Public Affairs by Francis Atwell/Released)