Marines with Combat Logistics Battalion 25, Combat Logistics Regiment 45, 4th Marine Logistics Group, practice throwing smoke grenades to mark a Helicopter Landing Zone aboard Marine Corps Air Ground Combat Center Twentynine Palms, California, June 9, 2018. During Integrated Training Exercise 4-18, CLB-25 Marines took part in MOT to further their experience with crew-served weapons employment, improvised explosive device immediate action drills and establishment of a Helicopter Landing Zone.