The U.S. Air Force's nuclear missile replacement program, now known as Sentinel, has seen its cost soar to around $160 billion from $95.8 billion, posing a threat to funding for other military modernization projects. The Northrop Grumman-managed initiative aims to replace Minuteman III missiles but has experienced a significant cost increase. This hike may force the Pentagon to revise the project's scope or timeline. The new figure surpasses the previously publicized rise and triggers the Nunn-McCurdy Act, which requires a formal justification for the program's cost escalation. Other Air Force priorities, such as aircraft development and space initiatives, could be impacted by the increased expenditure.

The U.S. Air Force's nuclear modernization program, Sentinel, has seen a significant cost increase, surpassing the initial projected cost of $95.8 billion to an estimated $160 billion [1]. This substantial rise has implications for the funding of other military modernization projects, posing a challenge to the Pentagon.

The Sentinel program, managed by Northrop Grumman, aims to replace the Minuteman III missiles. However, the escalating cost has raised concerns and could potentially force the Pentagon to reevaluate the program's scope or timeline. The cost per unit for the Sentinel system has risen from the initially projected $118 million to an estimated $162 million, leading to a projected total program cost of around $120 billion over the next decade [1].

This cost increase, which puts the Sentinel program in critical breach of the Nunn-McCurdy Act, could have far-reaching implications. The Act, designed to prevent significant cost overruns for weapons systems, requires formal justifications for cost escalations. Other priorities within the Air Force, such as aircraft development and space initiatives, could be affected by the increased expenditure, potentially leading to delays or reduced funding.

The Sentinel program calls for the acquisition of 659 missiles, updating 450 launch silos, and modernizing over 600 facilities to "like new conditions" [1]. However, the cost increase could lead to adjustments in these plans, potentially affecting the program's effectiveness and the overall modernization of the U.S. nuclear arsenal.

Under the Nunn-McCurdy Act, the Defense Department is required to report to Congress whenever a major defense acquisition program exceeds certain cost thresholds. The next report on the Sentinel program is expected to provide additional information on the cost increase, changes in performance or schedule, and actions taken or proposed to control cost growth.

In conclusion, the escalating cost of the U.S. Air Force's nuclear missile replacement program, Sentinel, poses a significant challenge to military modernization efforts. With the program now in critical breach of the Nunn-McCurdy Act, the Pentagon faces the need to reevaluate the program's scope or timeline, potentially impacting other priorities within the Air Force.

References:
[1] Libby Flatoff. (2024, March 5). Sentinel ICBM Exceeds Projected Cost by 37 Percent. Arms Control Association. https://www.armscontrol.org/act/2024-03/news/sentinel-icbm-exceeds-projected-cost-37-percent