Photo Information Marines and Sailors with 2nd Medical Battalion check the proper fit of their masks during a quarterly gas chamber qualification on Camp Lejeune, N.C., Sept. 8, 2017. Service members with the unit qualify quarterly to ensure they are effectively able to use protective equipment in a contaminated environment. (U.S. Marine Corps photo by Cpl. Ashley Lawson) Photo by Cpl. Ashley Lawson Download Details Share 2nd Medical Battalion qualifies in the gas chamber 11 Sep 2017 | Cpl. Ashley Lawson Marine Corps Base Camp Lejeune PRINT SHARE Camp Lejeune, N.C. -- More Media 2nd Medical Battalion qualifies in the gas chamber Photo by Cpl. Ashley Lawson Download Details Share 2nd Medical Battalion qualifies in the gas chamber Photo by Cpl. Ashley Lawson Download Details Share Tags 2nd Medical Battalion , gas masks , break seal , CS gas , Qualification , Gas Chamber