Marines with 4th Air Naval Gunfire Liaison Company, Force Headquarters Group, Marine Forces Reserve, participate in their final exercise for the Joint Fires Observer primer course at Avon Park Air Force Range in Avon Park, Florida, Aug. 11, 2017. - Marines with 4th Air Naval Gunfire Liaison Company, Force Headquarters Group, Marine Forces Reserve, participate in their final exercise for the Joint Fires Observer primer course at Avon Park Air Force Range in Avon Park, Florida, Aug. 11, 2017. The JFO primer course, the first of its kinda for MARFORRES ANGLICO Marines, focused on giving students pertinent and practical information for when they attend the actual course.

Staff Sgt. Andrew Chen, assistant team leader with 3rd Force Reconnaissance Company, 4th Marine Division provide security at objective rally point during a day and night dive and ship-to-shore advancement operation at Pensacola, Fla., March 22, 2017. The exercise focused on performing sustainment training on Marine combative dive tactics. The training will enhance the company’s capability conduct specialized insertion and extraction tasks. (U.S. Marine Corps photo by Sgt. Ian Ferro) - Staff Sgt. Andrew Chen, assistant team leader with 3rd Force Reconnaissance Company, 4th Marine Division provide security at objective rally point during a day and night dive and ship-to-shore advancement operation at Pensacola, Fla., March 22, 2017. The exercise focused on performing sustainment training on Marine combative dive tactics. The training will enhance the company’s capability conduct specialized insertion and extraction tasks. (U.S. Marine Corps photo by Sgt. Ian Ferro)