GT 256: ICBM test launch confirms system reliability

Air Force Global Strike Command conducted a test launch of an unarmed Minuteman III intercontinental ballistic missile May 20 at 12:01 a.m. Pacific Time from Vandenberg Space Force Base, California. The routine event, designated GT 256, was scheduled years in advance and was not conducted in response to world events. Officials said the exercise served as a comprehensive operational test of the weapon system and the personnel who maintain it.

“Our ability to conduct these rigorous, realistic tests is foundational to our national security,” said Gen. S.L. Davis, commander of Air Force Global Strike Command. “This launch verifies the health and readiness of our ICBM force, confirming the capability of every component of the ICBM enterprise, from our operators to the weapon system itself, to execute the mission.”

Engineers meticulously tracked the flight path to evaluate propulsion, guidance, and the reentry system under extreme physical stress. “This launch allows us to authenticate the complete performance profile of the Minuteman III,” said Lt. Col. Karrie Wray, commander of the 576th Flight Test Squadron. “It confirms the precision of the system, ensuring the reentry vehicle can be delivered to its target with pinpoint accuracy.”

Officials said the test assessed the entire ICBM mission set and produced data from a complete end-to-end systems check. That information is rapidly distributed to the Department of War, the Department of Energy, and U.S. Strategic Command to inform sustainment, engineering, and lifecycle analysis.

“These operational tests are the most visible and vital way we verify the readiness of our systems,” said Col. Dustin Harmon, 377th Test and Evaluation Group commander. “More importantly, they are a direct reflection of the unmatched skill and dedication of the Airmen in our missile community who ensure this critical mission is a success every single day.”

The launch was supported by maintenance and operations crews who treated the event as a high-fidelity rehearsal of daily procedures, using it to validate training against operational execution. “A test launch is the culmination of immense preparation,” Davis said. “The dedication of every Airman here is clear, and their actions contribute directly to our current and future warfighting capability. We have been and will continue to be ‘Always Ready.”

As the Air Force transitions toward the LGM-35A Sentinel, officials said this continuous cycle of operational testing is intended to ensure the current land-based leg of the nuclear triad remains safe, reliable, and effective until its successor is fully deployed.