321st MSS

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Branch

U.S. Air Force

Members

About 321st MSS

The 321st Missile Security Squadron (321st MSS) was an integral unit of the United States Air Force, tasked with providing security for the intercontinental ballistic missile (ICBM) facilities at Grand Forks Air Force Base, North Dakota. Activated in the 1960s during the height of the Cold War, the squadron played a vital role in safeguarding the 321st Strategic Missile Wing’s Minuteman missile silos and associated assets. Personnel of the 321st MSS conducted continuous patrols, rapid response operations, and security assessments to maintain the integrity of the nation’s nuclear deterrent. The unit remained active until the 1990s, when the deactivation of the 321st Strategic Missile Wing led to its inactivation.

Unit Members

Morris Larry

U.S. Air Force

321st MSSView Profile

Stephen Spradley

U.S. Air Force

321st MSSView Profile

Photos

Murphy's Last Yellow Alert

6595 • U.S. Air Force

Anniversary of Shepard's Flight From Cape Canaveral

6555th ASTG • U.S. Air Force

USAF Recruiting Photo

6595 • U.S. Air Force • 1981

U.S. Air Force • 1981

About 321st MSS

About this Unit

Historical Facts

• Origins: The 321st Missile Squadron (MSS) was originally activated as the 321st Bombardment Squadron (Heavy) in 1942 during World War II. • World War II Service: The squadron flew B-17 Flying Fortress bombers as part of the 90th Bombardment Group, conducting missions in the Pacific Theater. • Distinguished Unit Citations: The 321st earned two Distinguished Unit Citations for its heroic actions during World War II. • Transition to ICBMs: Reactivated in 1964, the 321st MSS transitioned to operating intercontinental ballistic missiles (ICBMs), specifically the Minuteman series. • Current Assignment: Today, the 321st Missile Squadron is part of the 90th Missile Wing, stationed at F. E. Warren Air Force Base in Wyoming. • Minuteman III Operations: The squadron operates and maintains 50 LGM-30G Minuteman III ICBMs, forming a critical leg of the U.S. nuclear triad. • Alert Status: The 321st MSS maintains a constant state of readiness, ensuring its missiles are on alert 24/7, able to respond to national defense needs at a moment’s notice. • Nickname: The squadron is known as the "Screaming Eagles," reflecting its heritage and fighting spirit. • Unit Emblem: The 321st’s emblem features a blue shield with a bald eagle and a missile, symbolizing its strategic mission and American values. • Community Involvement: Members of the 321st MSS are active in the Cheyenne, Wyoming community, participating in local events, educational outreach, and supporting military families.