PRONE SECURITY Marine Corps Lance Cpl. JaLissa Farr provides security while conducting a patrol during exercise Steel Knight 15 on Marine Corps Air Ground Combat Center in Twentynine Palms, Calif., Dec. 14, 2014. Farr is a motor transport operator assigned to Headquarters, Battalion Security Platoon, 1st Marine Division. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 341954-I-OPP37-025.jpg Photo Gallery