Marine Lance Cpl. Sean Lee reads a manual during a

Marine Lance Cpl. Sean Lee reads a manual during a radiological training course at the Government Training Institute in Barnwell, South Carolina, Dec. 10, 2019. During the course, the Marines learn enhanced radiological and nuclear reconnaissance and surveillance while also testing new equipment to better handle future threats the Marine Corps may face. Lee is a chemical, biological, radiological and nuclear defense specialist with Marine Wing Headquarters Squadron 2. (U.S. Marine Corps photo by Cpl. Cody Rowe)