Two medical professionals in lab coats examine a test tube.

U.S. Navy Petty Officer 2nd Class Sarah Williams, hospital corpsman, Naval Hospital Guam, teaches the different blood collection vials to Petty Officer 2nd Class, Caleb Fraizer, hospital corpsman, Headquarters Company, Marine Corps Base Camp Blaz, at Naval Hospital Guam, Guam, Jan. 8, 2026. Corpsmen from MCB Camp Blaz participated in on-the-job training at different military medical clinics across the island in preparation to increase capabilities on Camp Blaz. (U.S. Marine Corps photo by Lance Cpl. Afton Smiley)