May 21, 2026 GT-256 Patching Ceremony Team Vandenberg members gather following the recent launch of an unarmed Minuteman III Intercontinental Ballistic Missile during a patching ceremony at Vandenberg Space Force Base, Calif., May 21, 2026.
May 20, 2026 GT 256: ICBM Test Launch Verifies System Reliability An unarmed Minuteman III Intercontinental Ballistic Missile launches during an operational test at 12:01 Pacific Time, May 20, 2026, at Vandenberg Space Force Base, Calif. ICBM test launches help ensure the U.S. ICBM fleet is ready, reliable and effective.