GPS III Follow-On (GPS IIIF) | Source: Lockheed Martin Corporation.

Issue Area	Report Title (contact)	Report Number	Recommendation(s) and DOD's Response
Weapon Systems Assessment	Weapon Systems Annual Assessment: Requiring Mature Technologies Could Enable Shift to Rapid Delivery (Oakley)	GAO-26-108457	Recommendation(s) and agency response
Budget Justification	Fiscal Year 2027 Budget Justification Reviews for Army, Navy, Marine Corps, Air Force, Space Force, Missile Defense Agency, and Defense-Wide RDT&E and Procurement Accounts (Russell)	23 fact sheets and issue papers sent to Congress	GAO suggested up to $13.883 billion in reductions, rescissions, or restrictions
Acquisition Policy and Oversight	Department of Defense Acquisition Workforce Composition, Training, and Certification (Masters)	Briefing	N/A**
Acquisition Policy and Oversight	Defense Research and Engineering: Action Needed to Improve Management and Oversight of Technology Investments (Oakley)	GAO-26-107664	Matter(s) for congressional consideration, recommendation(s), and agency response
Acquisition Policy and Oversight	Special Operations Forces: Actions Needed to Improve Monitoring of Acquisitions (Oakley)	GAO-26-108036	Recommendation(s) and agency response
Acquisition Policy and Oversight	Weapon Systems Acquisition: Beyond Business as Usual—Using Leading Practices to Curb Waste and Save Billions (Oakley)	GAO-26-109135	N/A
Air	B-21 Long Range Family of Systems FY26 (Masters)*	Classified briefing	N/A**
Air	Collaborative Combat Aircraft (Masters)*	Classified briefing	N/A**
Air	F-35 Joint Strike Fighter: Update on Production and Modernization Efforts (Ludwigson)*	GAO-26-108728SU	N/A
Air	Future Vertical Lift: Senior Leaders Restructured the Army Aviation Portfolio to Reduce Costs (Winograd)	GAO-26-108025	N/A**
Air	Next Generation Air Dominance (NGAD) Aircraft 2026 Review (Masters)*	Classified briefing	N/A**
Cross-Cutting Issues	Defense Industrial Base: DOD Efforts to Develop Domestic Biomanufacturing (Russell)	GAO-26-107797	N/A**
Cross-Cutting Issues	Weapon Systems Testing: Reorganization of DOD’s Office of the Director, Operational Test and Evaluation (Oakley)	GAO-26-108859	N/A**
Ground	Army Modernization: Better Schedule and Cost Information Needed to Support Scaling Battlefield Network (Winograd)	GAO-26-108019	Recommendation(s) and agency response
Missile Defense and Strategic Nuclear	Assessment of the Sentinel Strategic Deterrent Program (Ludwigson)*	Classified briefing	N/A**
Missile Defense and Strategic Nuclear	Classified Annex for GAO-26-108452SU: Technical Details on Missile Production Performance and Capacity (Ludwigson)*	GAO-26-109242C	N/A
Missile Defense and Strategic Nuclear	Defense Moving Target Indicator (MTI) Acquisitions Review (Ludwigson)*	Classified briefing	N/A**
Missile Defense and Strategic Nuclear	Long-Range Standoff 2026 (Masters)*	Classified briefing	N/A**
Missile Defense and Strategic Nuclear	Missile Defense: Actions Needed to Better Address Technology Risk and User Needs in Hypersonic Defense Plans (Ludwigson)*	GAO-26-107699C	Contains classified recommendations
Missile Defense and Strategic Nuclear	Missile Defense: Actions Needed to Improve the Likelihood That Next Generation Interceptor Will Be Delivered on Time and on Budget (Ludwigson)*	GAO-26-108122SU	Contains sensitive matter(s) for congressional consideration, recommendation(s), and agency response
Missile Defense and Strategic Nuclear	Missile Defense: Annual Goals Remain Unmet as Missile Deliveries and Testing Continue (Ludwigson)*	GAO-26-108452SU	N/A
Missile Defense and Strategic Nuclear	National Security Snapshot: Intercontinental Ballistic Missile Modernization Faces Critical Risks and Opportunities (Ludwigson)	GAO- 26-108755	N/A
Sea	Navy and Coast Guard Shipbuilding: A Disciplined, Strategy-Driven Approach Is Needed to Achieve Ambitious Goals (Oakley)	GAO-26-109068	Recommendation(s) and agency response
Sea	Navy Contracting: Sea Systems Command Actively Manages Labor Cost Increases for Professional Support Services (DiNapoli)	GAO-26-107889	N/A
Sea	Navy Ship Modernization: DOD Needs Comprehensive Strategy to Field Hypersonic Missile Capability (Oakley)	GAO-26-107974	Recommendation(s) and agency response
Sea	Navy Shipbuilding: Improving Warfighter Engagement and Tools for Operational Testing Could Increase Timeliness and Usefulness (Oakley)	GAO-26-108781	Recommendation(s) and agency response
Sea	Robotic Autonomous Systems: Navy Needs to Address Leadership and Organizational Challenges to Meet Urgent Needs (Oakley)	GAO-26-109014	Matter(s) for congressional consideration, recommendation(s), and agency response
Sea	Virginia Class Submarine: Navy Needs More Realistic Schedule Goals and a Better-Informed Approach to Mitigate Risk (Oakley)*	GAO-26-107906SU	Contains sensitive but unclassified recommendation(s) and agency response
Space	DOD Space Command and Control Systems (Ludwigson)*	Classified briefing	N/A**
Space	Missile Warning Satellites: Space Development Agency Should Be More Realistic and Transparent About Risks to Capability Delivery (Ludwigson)	GAO-26-107085	Recommendation(s) and agency response
Space	National Security Space: DOD Has Opportunities to Improve Its Use of Commercial Data and Related Services (Ludwigson)	GAO-26-107959	Recommendation(s) and agency response
Space	Status of DOD Space Protection Acquisitions (Ludwigson)*	Classified briefing	N/A**
Space	Command and Control Programs for Space (Ludwigson)*	Classified briefing	N/A**
Space	Status of DOD Resilient Communications Programs (Ludwigson)*	Classified briefing	N/A**
* For report numbers ending in SU or C, please call or email the listed contact for more information.
** Briefings and testimonies usually do not contain recommendations.