PolicyBrief
S. 435
119th CongressFeb 5th 2025
Increasing Response Options and Deterrence of Missile Engagements Act of 2025
IN COMMITTEE

The IRONDOME Act of 2025 aims to bolster U.S. missile defense capabilities by accelerating development, deployment, and modernization of missile defense systems and technologies.

Dan Sullivan
R

Dan Sullivan

Senator

AK

LEGISLATION

IRONDOME Act of 2025: $19.5 Billion for Beefed-Up Missile Defense, New Radars, and Space-Based Interceptors

The "Increasing Response Options and Deterrence of Missile Engagements Act of 2025," or IRONDOME Act, is a sweeping plan to overhaul and massively expand the U.S. missile defense system. It's not just about shooting down incoming threats; the bill envisions a multi-layered shield incorporating everything from drone-based audio detection to space-based interceptors. The core goal? Deter attacks from major players like Russia and China, and, if deterrence fails, ensure the U.S. can retaliate decisively.

Remaking Missile Defense: From Agency to Branches

The bill shifts the day-to-day running of missile defense operations from the Missile Defense Agency (MDA) to the individual military branches (Army, Navy, Air Force, Space Force). The deadline for this handoff is October 1, 2024 (SEC. 4). The idea is to let the MDA focus on researching and developing new tech, while the military services handle the existing systems. Think of it like separating the mechanics who maintain the cars (military branches) from the engineers designing the next model (MDA). This could streamline operations, but it also means a major organizational shakeup.

Rapid Response, Rapid Spending

The IRONDOME Act greenlights some fast-tracked projects. U.S. Northern Command is directed to use a "rapid acquisition process" to build a drone network that uses sound to detect incoming missiles (SEC. 4). Similarly, the Space Development Agency is told to fast-track deployment of new satellite systems (tranches 3, 4, and 5 of their "proliferated warfighter space architecture" – basically, lots of small satellites) (SEC. 4). For example, a construction worker might suddenly see a surge in demand for specialized materials used in drone or satellite production, reflecting this rapid expansion.

Building the Shield: Interceptors, Radars, and Dirigibles

The bill mandates a significant buildup of missile defense hardware:

  • More Interceptors: Fort Greely, Alaska, will see a major expansion, housing at least 80 Next Generation Interceptors (NGIs) by January 1, 2038 (SEC. 4). This means more construction jobs in the area and a long-term boost to the local economy, but it also concentrates a critical (and potentially vulnerable) asset in one location.
  • Hypersonic Defense: The development of the Glide Phase Interceptor, designed to counter super-fast hypersonic missiles, is being accelerated (SEC. 4). A report is due within 180 days on how to speed this up even more, highlighting the urgency.
  • THAAD and Patriot Boost: Production of the Terminal High Altitude Area Defense (THAAD) system and Patriot missile batteries will also be ramped up (SEC. 4).
  • Eyes Everywhere: The bill pushes for modernized ground-based radars, including upgrades to the existing PARCS system (SEC. 4). New radar systems are also planned: a southern hemisphere-facing early warning radar, and Aegis Ashore systems on the East Coast and in Alaska (reports on site selection due within 180 days) (SEC. 4). This will likely mean new construction and tech jobs in those areas.
  • Space-Based Defense: The development of space-based interceptors – literally shooting down missiles from space – is also accelerated (SEC. 4). A feasibility study on reducing their cost is due within 180 days.
  • Dirigibles: The Army will acquire and field dirigibles to support missile defense and create resilient communication networks, especially in emergencies (SEC.4).

Money, Money, Money

All of this comes with a hefty price tag: $19,548,100,000 authorized for fiscal year 2026 alone (SEC. 5). Here's a breakdown of some key spending areas:

  • $1.4 billion for THAAD systems
  • $1.5 billion for PAC2 and PAC3 Patriot batteries
  • $12 billion for expanding missile interceptor fields at Fort Greely
  • $750 million for modernizing ground-based radars
  • $900 million for space-based missile defense research

Cutting Red Tape (and Maybe Corners?)

One potentially controversial provision allows the Secretary of Defense to waive regulations that hinder construction or modernization related to "urgent missile defense needs" (SEC. 4). While this could speed things up, it also raises concerns about potential environmental impacts or bypassing local input. Congress must be notified within 45 days of any such waiver.

Sharing the Tech

The bill also encourages sharing integrated missile defense technology with "trusted allies" (SEC. 4). This could strengthen alliances, but also carries the risk of sensitive technology falling into the wrong hands. The bill also calls for securing supply chains critical to missile defense production (SEC. 4) – a nod to the vulnerabilities exposed in recent years.

The Big Picture

The IRONDOME Act represents a major shift in U.S. missile defense strategy, moving from a focus on limited threats to preparing for large-scale conflicts. It's a massive investment in technology and infrastructure, with potential benefits for national security and certain industries. However, it also raises questions about cost, potential environmental impacts, and the risks of technological proliferation. The rapid acquisition and waiver provisions, while intended to speed up development, could also lead to unforeseen consequences. This bill is a big deal, with long-term implications for both national security and the economy.