Members of the 576th Flight Test Squadron monitor an operational test launch of an unarmed Minuteman III missile March 27, 2015, at Vandenberg Air Force Base, Calif. The intercontinental ballistic missile test launch program demonstrates the operational credibility of the Minuteman III and ensures the United States’ ability to maintain a strong, credible nuclear deterrent as a key element of U.S. national security and the security of U.S. allies and partners.