Sgt. 1st Class Elijah Williamson, the U.S. Army Medical Test and Evaluation Activity test officer, takes notes as a test player practices administering the Rapid Opioid Countermeasure System (ROCS) autoinjector on a simulated casualty in June 2021 at Camp Bullis Military Training Reservation, Texas. (Photo by Jose Rodriguez, U.S. Army Medical Center of Excellence)