The US Air Force’s latest intercontinental ballistic missile, the Sentinel, is nearing its first test flight, expected to happen next year. Officials confirmed this development recently, signaling progress in the missile’s development. However, questions remain about the infrastructure needed to support this new missile, including the number of silos and their construction timelines.

Progress on the Sentinel Missile

The LGM-35A Sentinel is set to replace the older Minuteman III fleet, which has been in service since 1970. The first of these new missiles is anticipated to become operational in the early 2030s. This upgrade aims to modernize the US nuclear deterrent, but it will take several years to fully deploy and activate all units.

The missile’s first flight marks a significant milestone, but military officials are cautious about providing a timeline for full deployment. The development process includes rigorous testing to ensure the missile’s reliability and safety before it becomes part of the active arsenal.

Infrastructure Challenges and Construction Delays

One of the major hurdles is the construction of hundreds of new missile silos across the Great Plains. These underground facilities are essential for housing and launching the Sentinel missiles. However, progress on building these silos has been slower than expected, and there is little clarity on when they will be completed.

The costs associated with building these silos are also uncertain. Since the project involves extensive underground construction, estimates vary widely, and budget overruns are possible. This uncertainty raises questions about the overall timeline for achieving full operational capability.

Additionally, it is unclear how many nuclear warheads each Sentinel missile could carry, as specific details about the missile’s payload remain classified. These uncertainties highlight the complex logistics and planning involved in modernizing the nation’s nuclear forces.

While the missile itself is nearing readiness, the infrastructure delays could impact the overall deployment schedule. Experts suggest that completing the silos and related facilities might take longer than initially projected, potentially pushing back the full operational status of the Sentinel fleet.

Overall, the development of the Sentinel missile represents a significant upgrade for the US military’s nuclear capabilities. Still, infrastructure challenges and budget concerns underscore the complexity of such a large-scale modernization effort. As the first test flight approaches, officials and analysts are watching closely to see how these issues unfold over the coming years.

Inspired by

• https://arstechnica.com/space/2026/02/the-air-forces-new-icbm-is-nearly-ready-to-fly-but-theres-nowhere-to-put-them/

Sources

• army.mil
• gao.gov
• politico.com
• reuters.com