Throughline (NPR)

Episode: 3 Key Moments That Led to the U.S.-Iran War

Release Date: March 12, 2026
Hosts: Rund Abdelfatah & Ramtin Arablouei
Featured Guests: Karim Sadjadpour, Michael Eisenstadt, Kim Zetter

Overview

In this episode, Throughline examines the historical events and pivotal confrontations that have defined and escalated tensions between the United States and Iran—focusing on three crucial flashpoints: direct military clashes in the Persian Gulf, Iran’s pioneering use of proxy forces in the Middle East, and the escalation of conflict into the cyber domain. Through archival audio, expert interviews, and original reporting, the hosts trace the adversarial relationship’s evolution from the fall of the Shah in 1979, through the Iran-Iraq War and the rise of proxy warfare, culminating in the 21st-century cyber arms race typified by Stuxnet. The discussion illustrates how each confrontation deepened mistrust and strategic hostility, ultimately laying the groundwork for modern conflict.

Part 1: The Tanker Wars and Direct U.S.-Iran Military Confrontation (1979–1988)

The 1979 Revolution and Hostage Crisis [01:16–02:44]

• The overthrow of the U.S.-backed Shah and Ayatollah Khomeini’s rise marked the beginning of open hostility.
  • "In a course of months, Iran went from one of America's best allies to one of America's worst adversaries." — Expert/Analyst [02:01]
• The 1979 U.S. Embassy takeover in Tehran and ensuing hostage crisis cemented Iran as an adversary.

Iran-Iraq War and Escalation in the Persian Gulf [04:00–10:18]

• The Iran-Iraq War (1980–88) drew in global powers due to its effects on oil shipping and Gulf security.
  • War tactics spilled over into naval attacks on oil tankers, threatening global oil supply.
  • "For both countries, oil is the lifeblood of their economy...they're trying to sink one another's oil tankers." — Expert/Analyst [05:54]
• The U.S. entered by reflagging Kuwaiti tankers and providing naval escorts to deter Iranian attacks.

Naval Clashes and the Vincennes Incident [10:52–17:26]

• U.S. forces conducted retaliatory strikes on Iranian oil platforms.
  • Controversy erupted over direct U.S. military involvement in the Gulf, with Congress questioning the strategy.
  • "Why are we putting American flags on the vessels of other countries? Why are we...potentially getting involved in a war between two countries which are both adversaries?" — Expert/Analyst [09:52]
• The Downing of Iran Air Flight 655 [12:43–16:50]:
  • Amid naval tensions, U.S. warship Vincennes misidentified and shot down an Iranian civilian airliner, killing 290.
  • "They mistook it for an Iranian military aircraft...they shot two surface-to-air missiles which brought down the Iranian airliner, killing two hundred and ninety civilians aboard." — Ramtin Arablouei [14:11–14:38]
  • "To this day, the Iranian government believes there was no way this was an accident...the message that was taken by the Iranian side was that this was an act of open hostility." — Expert/Analyst [15:29–16:31]

Aftermath and Strategic Takeaways [16:50–19:36]

• Both nations learned to avoid large-scale direct clashes, with Iran focusing on asymmetric strategies.
  • "Iran realized it cannot compete in a head-to-head conventional military matchup...how it can compete is using essentially asymmetric warfare: proxies, mines, in some cases taking hostages, having plausible deniability." — Expert/Analyst [18:30]

Part 2: Proxy Warfare and the Shadow War Model

Beirut Barracks Bombing (1983) [21:00–26:25]

• Suicide truck bombing killed 241 U.S. Marines in Beirut; innovative at the time, now seen as Iran’s first major proxy attack (via Islamic Jihad, precursor to Hezbollah).
• "It was widely assumed that Iran was responsible. But Iran shrewdly operated via proxy...the attack was blamed on a group called Islamic Jihad, which is widely thought to be essentially the precursor to Lebanese Hezbollah." — Expert/Analyst [22:53]

Rise of Hezbollah and the ‘Proxy Playbook’ [23:49–29:45]

• The Iranian Revolution and the Israeli invasion of Lebanon catalyzed Hezbollah’s formation and Iran’s investment in militia networks.
  • "The emergence of a group called Hezbollah, the Party of God, was essentially a byproduct of two momentous events. One was the 1979 Iranian Revolution, and the other was the 1982 Israeli invasion of Lebanon." — Expert/Analyst [23:55]
• Iran transformed its anti-U.S. strategy, using regional militant groups for plausible deniability and to test American resolve.
  • U.S. withdrawal from Lebanon was perceived as a victory for Iran’s methods.
  • "By not responding to that massive attack by Iran against the US Marines, it essentially emboldened Iran." — Expert/Analyst [25:13]

Iran’s Proxy Strategy Spreads Iraq, Syria, Yemen [27:44–31:14]

• After 2003, Iran ‘franchised’ the Hezbollah model in Iraq and beyond to project influence and counter U.S. ambitions.
  • "Iran has essentially tried to franchise the Hezbollah model. You know, I call it the McDonaldization of Hezbollah." — Expert/Analyst [28:27]
• In ongoing Middle Eastern conflicts, Iran leverages loyal Shia proxies to fill power vacuums (e.g., in Iraq, Syria, Yemen).
  • "Iran has a monopoly over Shia radicalism. And increasingly, not only does Iran operate via proxy, but its proxies also have plausible deniability because they're not necessarily doing the fighting themselves." — Expert/Analyst [30:21]
• U.S. and its allies are left reactive—unable to match this asymmetric advantage.

Part 3: The Cyber War Era (Stuxnet & Beyond)

Stuxnet: The World’s First Digital Weapon [32:33–41:14]

• Origins: As Iran pursued nuclear enrichment at Natanz, Israel pressed for military strikes; the U.S. opted for sabotage by cyber means instead.
• Deployment: Stuxnet (a worm) was developed by the U.S. and Israel, infiltrating via USB drives likely introduced by a mole.
  • "The goal with Stuxnet was to destroy some of the gas and some of the centrifuges in order to buy time for diplomacy and sanctions to catch up." — Kim Zetter [37:54]
  • Stuxnet disguised sabotage as technical failure by feeding false info to Natanz operators, also disabling safety mechanisms.
• Impact: The worm destroyed hundreds of Iranian centrifuges without being detected, sowing confusion among engineers.
  • "And so they wouldn't have seen the sabotage happening. What they would have seen, however, is that they were losing gas...eventually, the centrifuges start breaking down." — Kim Zetter [39:00]
• Discovery & Blowback: The worm’s later, more aggressive versions spread unchecked online, leading cybersecurity companies to analyze and expose it.
  • "When you're launching a digital weapon, it's fully contained and all the code is done there. And so you're sending the blueprint for the weapon to your victim. And all the victim has to do is reverse engineer that weapon...and send it back to you." — Kim Zetter [47:02]
  • Stuxnet’s exposure sparked a global cyber arms race, lowering barriers for other nations to launch cyberattacks.

Broader Implications [45:17–48:06]

• Iran didn’t respond overtly, but learned lessons and began developing its own cyber capabilities.
• Digital war eliminates “geographic safety” — now the U.S. faces direct cyber retaliation on home soil, raising the stakes and unpredictability of conflict.
  • "Digital warfare erases that distance. Now the front line is on businesses and critical infrastructure here. It's brought the war home." — Kim Zetter [47:58]

Memorable Quotes & Moments

• "In a course of months, Iran went from one of America's best allies to one of America's worst adversaries." — Expert/Analyst [02:01]
• "Iran cannot compete with the United States head-to-head...how it can compete is using asymmetric warfare." — Expert/Analyst [18:30]
• "By not responding to that massive attack...it essentially emboldened Iran." — Expert/Analyst [25:13]
• "Iran has a monopoly over Shia radicalism." — Expert/Analyst [30:21]
• "When you're launching a digital weapon...you're sending the blueprint for the weapon to your victim." — Kim Zetter [47:02]
• "Digital warfare erases that distance...now the front line is on businesses and critical infrastructure here. It's brought the war home." — Kim Zetter [47:58]

Key Timestamps

• [01:16] – 1979 Revolution and the U.S. Hostage Crisis
• [04:00] – Start of the Iran-Iraq War and Gulf escalation
• [12:43] – USS Vincennes shoots down Iran Air Flight 655
• [21:00] – Beirut Marine barracks bombing and rise of Hezbollah
• [27:44] – U.S. invasion of Iraq, Iran’s Shia proxy network expands
• [32:33] – Launch and effects of Stuxnet cyberattack
• [46:24] – Iranian retaliation and the birth of cyber conflict

Conclusion

Through a mosaic of personal accounts, expert commentary, and historical sound, the episode illuminates how miscalculation, escalation, and innovation—from tankers and proxy militias to computer worms—have shaped the enduringly volatile US-Iran rivalry. The cycle of action and retaliation, across evolving battlefields, has not only defined relations between these two nations but has also contributed to a new, more complex era of global conflict—one in which boundaries, rules, and even the definition of war itself are perpetually redefined.