U.S. Marine Corps Lance Cpl. Darius Phillips, administrative specialist assigned to 4th Marine Regiment, breaks 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)