U.S. Marine Corps Gunnery Sgt. Zacaria Martinez, a platoon sergeant with 3rd Low Altitude Air Defense Battalion, 3rd Marine Aircraft Wing, provides a safety brief on OP6 Stinger live-fire exercise during ARCTIC EDGE 2026 (AE26) near Fort Greely, Alaska, March 7, 2026. AE26 is a North American Aerospace Defense Command (NORAD) and U.S. Northern Command-led homeland defense exercise designed to improve readiness, demonstrate capabilities, and enhance Joint and Allied Force interoperability in the Arctic. (U.S. Marine Corps photo by Sgt. Aaron TorresLemus)