Answer : 3. "United States"
Explanation :

The US test-fired a Minuteman III ICBM from Vandenberg Space Force Base. The Minuteman III, deployed in the 1960s, is the only land-based component of the US nuclear triad designed by Boeing. Despite initial plans for ten years of service, it will be used until the GBSD becomes available in 2029. The three-stage, solid-fuel missile, with a range of 13,000 kilometers, currently carries a single nuclear warhead, ensuring fast launch and high reliability.