Security Sight Marine Corps Lance Cpl. Ethan J. Pezdark provides security during Exercise Steel Knight at Twentynine Palms, Calif., Dec. 8, 2019. Steel Knight is an annual exercise in which Marines and sailors improve their ability to win a complex, dispersed fight. SHARE IMAGE: Download Image: Full Size (2 MB) Tags: training, Marine Corps, exercises, Steel Knight Photo By: Marine Corps Pfc. Ulises Salgado VIRIN: 191208-M-DR594-1327M.JPG Photo Gallery