Marines with Marine Wing Support Squadron 171, Marine Rotational Force – Darwin, and their Australian counterparts with Aviation Rescue Firefighting Service, Airservices Australia, Darwin International Airport, practice extinguishing controlled chemical fires May 11 at RAFF Base Darwin, Darwin, Northern Territory, Australia. MWSS-171 is a part of the Marine Air - Ground Task Force that is composed of aviation, ground, and logistics combat elements, and lead by a command element, creating the MRF-D. The rotational deployment in Darwin enables Marines to more effectively train, exercise and operate with their partners, enhancing regional security and building a capacity to respond more rapidly to natural disasters and crises throughout that region. (U.S. Marine Corps photo by Cpl. Angel Serna/Released) - Marines with Marine Wing Support Squadron 171, Marine Rotational Force – Darwin, and their Australian counterparts with Aviation Rescue Firefighting Service, Airservices Australia, Darwin International Airport, practice extinguishing controlled chemical fires May 11 at RAFF Base Darwin, Darwin, Northern Territory, Australia. MWSS-171 is a part of the Marine Air - Ground Task Force that is composed of aviation, ground, and logistics combat elements, and lead by a command element, creating the MRF-D. The rotational deployment in Darwin enables Marines to more effectively train, exercise and operate with their partners, enhancing regional security and building a capacity to respond more rapidly to natural disasters and crises throughout that region. (U.S. Marine Corps photo by Cpl. Angel Serna/Released)