 Marines and sailors with 3rd Radio Battalion, attached to the 31st Marine Expeditionary Unit, patrol the dense environment of the Jungle Warfare Training Center. A day spent navigating narrow muddy trails through heat, humidity, and thick vegetation helps familiarize Marines with the challenges of conducting security operations in jungle terrain. All Marines are required to fight any climate and place. The whole environment I could be called up anytime to go to work with any various combat unit so that the jungle is trained and very important to me. The day of patrolling was part of a multi-week program designed to prepare Marines for every aspect of Jungle Warfare. Marine Sergeant Paul Robbins, Jr. Okinawa, Japan.