Navy Lt. Jonathan T. Lau, battalion surgeon, 3rd Battalion, 7th Marine Regiment, reports a patient’s vitals to Petty Officer 3rd Class Dranreb Villegas, left, a corpsman, 3rd Bn., 7th Marines, Jan. 31, 2014. Lau, a 29-year-old native of Whittier, Calif., and his team of corpsmen have saved many lives of coalition service members and the Afghan locals in the Sangin District.