California Army National Guard Sgt. Damian Rubio from the 9th Civil Support Team puts on his protective mask before starting the Chemical, Biological, Radioactive and Nuclear (CBRN) event during the 2014 Best Warrior Competition at Camp San Luis Obispo on Oct. 22. The CBRN event tests the Soldiers' ability to keep calm and composed after a chemical attack. (U.S. Army National Guard photo/Sgt. Ian M. Kummer/Released)