U.S. Marine Corps Lance Cpl. Darius Phillips, administrative specialist assigned to 4th Marine Regiment, prepares to break the seal of his M50 Joint Service General Purpose Mask during annual training at Range 105-A aboard Camp Wilson, Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Jan. 23, 2015. Integrated Training Exercise (ITX) 2-15, being executed by Special Purpose Marine Air-Ground Task Force 4 (SPMAGTF-4), is being conducted to enhance the integration and warfighting capability from all elements of the MAGTF. (U.S. Marine Corps photo by Lance Cpl. Aaron S. Patterson, MCBH Combat Camera/Released)