The U.S. Air Force’s Sentinel ICBM (Intercontinental Ballistic Missile) program is facing significant cost overruns and delays, raising concerns about its future viability and the impact on the broader nuclear modernization effort.
In January 2024, the Air Force informed Congress that the program had breached the Nunn-McCurdy Act, which mandates notification of cost overruns exceeding 25 percent. The Sentinel program reported a 37 percent cost increase, combined with a two-year schedule delay.
The situation deteriorated further by July 2024 when the Department of Defense, while certifying the program to continue after its Nunn-McCurdy breach, revealed an updated cost estimate of $140.9 billion.
This new estimate represents an 81 percent increase from the previous figure. Additionally, the program’s timeline was extended by three years.
Officials pointed to flawed assumptions and program mismanagement as contributing factors to the escalating costs and delays.
The awarding of a sole-source contract, a highly unusual decision for a program of this magnitude, has also been cited as a major contributor to the issues plaguing the project.
During the first Trump administration, the FTC allowed Northrop Grumman’s acquisition of Orbital ATK, effectively giving the defense contractor a near-monopoly in the large rocket motor market, close despite objections from Boeing and other rival companies.
The Sentinel program’s massive cost overruns—81 percent beyond initial estimates—flowed largely from the U.S. government’s 2018 decision.
The Sentinel ICBM program, originally designed to modernize the U.S. nuclear arsenal, is on track to become one of the most expensive nuclear modernization efforts in U.S. history. The delays and cost overruns have raised concerns within the Department of Defense and among lawmakers, who are questioning whether the program can deliver on its objectives within the allotted budget and timeline.
As the program continues to struggle, the future of the Sentinel ICBM and its place in the U.S. nuclear strategy remain uncertain.