260523-M-TH074-1024 (May 26, 2026) A civilian instructor trains a U.S. Marine on the use of an Sensitive but Unclassified - Encrypted (SBU-E) network node as part of Marine Corps Tactical Systems Support Activity's (MCTSSA) Expeditionary Warfare Operations Kit (EWOK). EWOK is self contained, secure, commercial-grade tactical network designed to turn frontline Marines into sensors. (U.S. Marine Corps Photo by Joseph R. Vincent, CTR) - 260523-M-TH074-1024 (May 26, 2026) A civilian instructor trains a U.S. Marine on the use of an Sensitive but Unclassified - Encrypted (SBU-E) network node as part of Marine Corps Tactical Systems Support Activity's (MCTSSA) Expeditionary Warfare Operations Kit (EWOK). EWOK is self contained, secure, commercial-grade tactical network designed to turn frontline Marines into sensors. (U.S. Marine Corps Photo by Joseph R. Vincent, CTR)