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U.S. Military Operations Against Iran’s Missile and Nuclear Programs

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U.S. Military Operations Against Iran's Missile and Nuclear Programs
March 6Updated October 20, 2026 (IN12665)

On February 28, 2026, the United States and Israel launched military operations against Iran. The same day, President Donald J. Trump listedTrump listed among the operation's objectives preventing Iran from acquiring a nuclear weapon, destroying Iran's missiles, and "[razing] their missile industry to the ground." Some Members of Congress have questioned the U.S. military operations in Iran given President Trump's previous comments assertion that, as a result of the June 2025 U.S.-Israeli strikes, "Iran's key nuclear enrichment facilities have been completely and totally obliterated." Other Members have supported the President's action, citing Iran's post-2025 efforts to reconstitute its nuclear program and its ballistic missile capabilities.

Iran's Ballistic Missile and Drone Programs

Iran has developed ballistic missiles, cruise missiles, and space-launch vehicles, as well as drones (i.e., unmanned aircraft systems, or UAS). Iran's ballistic missile inventory has included short- and medium-range ballistic missiles, the largest of which have an estimated range of approximately 2,000 kilometers (1,864 miles), according to a 2020 U.S. government estimate. Iran has also mass-produced the Shahed-136, a long-range one-way attack drone, and has provided these drones to Russia for use in its war in Ukraine. The 2025 Worldwide Threat Assessment stated, "Iran has fielded a large quantity of ballistic and cruise missiles as well as [UAS] that can strike throughout the region and continues efforts to improve their accuracy, lethality, and reliability."

Since February 28, U.S. and Israeli aircraft have Reports on the status of Iran's missile and drone programs vary as of October 2026 amid continued, albeit reduced, military confrontation between the United States and Iran.

Iran's Ballistic Missile and Drone Programs

Iran has developed short- and medium-range ballistic missiles, cruise missiles, and space-launch vehicles. Iran has also mass-produced various long-range one-way attack drones, such as the Shahed-136, and has provided drones to Russia for use in its war in Ukraine. After Israeli strikes on Iranian missile sites in 2024 and 2025, Iran "focused on rebuilding damaged infrastructure and pursuing Russia- and China-origin systems and materials to replace equipment," according to an April 2026 U.S. Defense Intelligence Agency (DIA) assessment.

Beginning on February 28, 2026, U.S. and Israeli aircraft targeted bases and equipment associated with Iran's ballistic missile program, including missiles Iran may have stored in underground facilities. The White House stated on April 8, after the United States and Iran agreed to a temporary ceasefire, that the operation involved strikes on "more than 450 ballistic missile targets" and "approximately 800 attack drone targets," and that "Iran's ballistic missile arsenal and production capacity has been razed." Since April, the United States has continued to target Iranian missile and drone facilities, and Iranian ballistic missiles and drones have struck U.S. and partner military and civil sites, as well as vessels in the Strait of Hormuz.

DIA assessed in April 2026 that Iran "retains thousands of missiles and one-way attack UAVs that can threaten U.S. and partner forces throughout the region, despite degradations to its capabilities from both attrition and expenditure." News articles in July, August, and September, citing satellite imagery and U.S. and Israeli military and intelligence officials, stated that Iran may have begun rebuilding military infrastructure, restoring access to missile bases, and resuming missile production using stockpiled components. An Iranian official reportedly asserted in August that Iran has sufficient "stockpiles in our underground missile and drone cities" to enable continued production. Some reports have highlighted the damage to Iranian production facilities and the difficulties Iran may face in reconstituting its missile development and production capability.

targeted bases and equipment associated with Iran's ballistic missile program, including missiles Iran may have stored in underground facilities. The effect of the strikes on Iran's inventory of ballistic missiles and production capacity is unclear. Following the Israeli and U.S. attacks, Iran has reportedly conducted ballistic missile and drone strikes on U.S. and partner military and civilian sites in several countries.

The size of Iran's ballistic missile inventory is uncertain. A 2019 Defense Intelligence Agency report described the inventory as "substantial." In 2022, then-U.S. Central Command Commander General Kenneth McKenzie testified Iran had an inventory of "over 3,000 ballistic missiles of various types." A 2026 article reported Iran's inventory at more than 2,000 medium-range ballistic missiles.

Israeli and U.S. officials have stated varying estimates of Iran's ballistic missile production capacity. On March 1, the Israeli military estimated Iran was producing "dozens of ballistic missiles per month." On March 2, Secretary of State Marco Rubio said Iran had been producing "over 100" such missiles a month. U.S. officials reportedly said, prior to June 2025, Iran was producing 50 missiles per month.

Iran's ballistic missiles were also the target of Israeli airstrikes during the June 2025 U.S.-Israeli operation. Iran may have made efforts to rebuild its missile inventory. An October 2025 media report, citing European intelligence sources, stated Iran accepted shipments of chemical precursors for solid rocket motor propellant. In November 2025, the U.S. Treasury Department sanctioned entities and individuals associated with the "procurement of ballistic missile propellant ingredients" on behalf of Iran.

Iran's Nuclear Program

Iran for decades has maintained a uranium enrichment program. Uranium enrichment can produce both low-enriched uranium, which can be used in nuclear power reactors, and highly enriched uranium (HEU), which is one of the two types of fissile material used in nuclear weapons. Tehran asserts its enrichment program is only meant to produce fuel for peaceful nuclear applications.

Whether the U.S.-Israeli strikes since February 28 have affected Iran's nuclear facilities is unclear. On March 4, based on analysis of satellite imagery, the International Atomic Energy Agency (IAEA) reported "no damage to facilities containing nuclear material in Iran," but some damage "at entrances" to Iran's largestthe Natanz enrichment facility. The agency subsequently reported that analysis of such imagery revealed "damage to additional non-nuclear-related buildings" near this facility. The enrichment facility. The IAEA, which implements safeguards on Iran's nuclear facilities because the government is a state party to the Nuclear Nonproliferation Treaty, withdrew inspectors from Iran in June 2025 after U.S.-Israeli airstrikes on Iranian nuclear facilities, including those associated with Tehran's enrichment program.

The extent to which those strikes impacted Iran's enrichment program is unclear. . In November 2025, Iranian Deputy Foreign Minister Kazem Gharibabadi said Iran was not enriching uranium. The IAEA has not been able to inspect the attacked Iranian nuclear facilities since the June 2025 strikes. U.S. government reports have provided differing assessments of the June 2025 strikes' impacts. According to the 2025 U.S. National Security Strategy, the strikes "significantly degraded" Iran's nuclear program, while the 2026 National Defense Strategy stated the strikes "obliterated" the program."

The U.S. intelligence community has for years assessed that Iran could have the capability to produce nuclear weapons at some point, but also that Tehran halted its nuclear weapons program in late 2003 and had not mastered all of the necessary technologies for building such weapons. U.S. intelligence has also consistently assessedalso assessed, through 2025, that Tehran hashad not reauthorized the development of nuclear weapons. Prior to the 2026 airstrikes, Iran "was intending to try to recover from the devastation of its nuclear infrastructure," the 2026 Annual Threat Assessment (ATA) of the U.S. Intelligence Community states. On March 2, IAEA Director General Rafael Grossi stated the agency had no evidence of "a structured [Iranian] program to manufacture nuclear weapons."

Legislative Activity

The House Armed Services Committee (HASC), in a report accompanying the HASC-reported version of a National Defense Authorization Act for Fiscal Year 2027 (H.R. 8800; H.Rept. 119-698), directed the Secretary of Defense (who is using "Secretary of War" as a "secondary title" under Executive Order 14347, dated September 5, 2025) to submit to the committee a report by February 1, 2027, on the "impact of United States military operations … on Iran's nuclear and missile capabilities not reauthorized the development of nuclear weapons.

Constraints imposed on Iran's nuclear program required by the 2015 Joint Comprehensive Plan of Action addressed concerns about the speed with which Iran could produce sufficient amount of fissile material for a nuclear weapon. Under these constraints, Tehran would have needed one year to produce enough fissile material for a nuclear weapon. In May 2025, the Defense Intelligence Agency assessed that Iran then would have needed "probably less than one week" to produce that amount of fissile material. In November 2025, Iranian Deputy Foreign Minister Kazem Gharibabadi said Iran was not enriching uranium. On March 2, IAEA Director General Rafael Mariano stated the agency had no evidence of "a structured [Iranian] program to manufacture nuclear weapons."

Considerations for Congress

Congress may consider assessing the status and scope of existing reporting requirements on Iran, including of Section 1245 of P.L. 111-84 (10 U.S.C. §113 note), which directed the Secretary of Defense (who is using "Secretary of War" as a "secondary title" under Executive Order 14347, dated September 5, 2025) to submit to Congress an "annual report on the military power of Iran."" by January 30 of each year. Congress has modifiedmodified this requirement, including by directing the Secretary to provide additional information about Iran's nuclear and drone programs ((P.L. 119-60, , §1222(b)(4)). Congress may consult that report to determine whether or not it should include additional information. Congress may consider directing the Pentagon to publish an unclassified,a public version of the report. Members could ask questions concerning the above topics during threat assessment hearings.