What is the common examiner trap about Science & Tech in UPSC exams?

They may ask about the success rate of a system in one context (e.g., Iron Dome's 80-97% against rockets) to trick you into applying it to a different context (e.g., against ballistic missiles). They may also swap the names of systems and their primary intercept range (e.g., Arrow 3 for exo-atmospheric vs. David's Sling for endo-atmospheric).

What should UPSC aspirants remember about Science & Tech for Prelims?

1. Target this Data: PAC-3 MSE interceptor cost of $4 million per shot. 2. Target this Nodal Body: U.S. Department of Defence (DoD) - ordering quadrupled production of THAAD and PAC-3 MSE interceptors. 3. Target this Technology: 'Hit-to-kill' interceptor technology used in newer systems like Cheongung II and Patriot PAC-3 MSE.

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News 22 of 23

Missile Defence Systems: Patriot, THAAD, Iron Dome Tested in U.S.-Iran Conflict; PAC-3 MSE Costs $4M per Interceptor

Q: Which U.S. government department, as mentioned in the article, has quadrupled production orders for THAAD and PAC-3 MSE interceptors?

Department of Defence, The article explicitly states that the 'U.S. Department of Defence has already quadrupled production orders for THAAD and PAC-3 MSE interceptors'. The Department of Defence (DoD) is responsible for the military and procurement of defence systems.

Q: Consider the following statements regarding missile defence systems: 1. The U.S. Patriot system's PAC-3 MSE interceptors use 'hit-to-kill' technology. 2. Israel's Iron Beam is a high-energy laser system primarily used against ballistic missiles. 3. South Korea's Cheongung II system uses a Vertical Launch System allowing 360° engagement. Which of the statements given above is/are correct?

Both 1 and 3, Statement 1 is correct as the article mentions newer interceptors like those in Patriot are 'hit-to-kill'. Statement 2 is incorrect; Iron Beam is described as a defence against 'drone swarms', not primarily ballistic missiles. Statement 3 is correct as Cheongung II uses a 'Vertical Launch System' with a rotating radar for 360° coverage.

Q: According to the article, what is the approximate cost of one PAC-3 Missile Segment Enhancement (MSE) interceptor used in the Patriot system?

$4 million, The article states: 'The system’s PAC-3 Missile Segment Enhancement (MSE) interceptors however cost around $4 million per shot.' This is a key data point highlighting the high cost of advanced missile defence.

Q: What is the primary strategic challenge, as discussed in the article, that leads militaries to 'ration' the use of advanced missile interceptors like the Patriot?

The high cost per interceptor making sustained defence against mass attacks economically unfeasible., The article explains that systems like Patriot need to be 'rationed' to 'keep costs down' because each PAC-3 MSE interceptor costs $4 million. This creates a vulnerability to 'saturation attacks' where an enemy fires many cheap missiles to exhaust the limited, expensive interceptors.

Science & Tech Security & Defence Intl. RelationsHIGH

Target:UPSC GS-IIIMPSCTeachingSSC GAPrelims HighMains High

01 Mar 2026

~2 min

Source: The Hindu

Key Data:$4 million per PAC-3 MSE interceptor80-97% Iron Dome success rate55% GMD test success rateOver 500 ballistic missiles in 2025 war

Bodies:U.S. Department of DefenceCenter for Arms Control and Non-ProliferationU.S. Air Forces Central Command

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~2 min · Quick mode

What This Article Covers

1.Recent conflict between U.S.-led coalition and Iran tested an integrated regional air and missile defence network, including systems like Patriot, THAAD, and Cheongung II.

2.Interceptor efficacy varies widely; Iron Dome has 80-97% success against rockets, while Patriot's success dropped to ~10% against modified Russian missiles with decoys.

3.Cost is a major constraint: PAC-3 MSE interceptors cost $4M each, leading to strategies like 'rationing' and the use of cheaper systems like the Indirect Fire Protection Capability with AIM-9X missiles.

The Big Picture

Prelims · HighMains · High

Recent U.S.-Iran hostilities have served as a major live test for integrated global missile defence systems like Patriot, THAAD, and Iron Dome, highlighting their capabilities, limitations, and staggering costs. For exam aspirants, this is a critical case study in modern warfare technology, strategic deterrence, and defence economics, with direct relevance to India's own Ballistic Missile Defence (BMD) program.

Exam Lens

Quick Exam Facts From News

PAC-3 MSE Cost$4 million per interceptor

Iron Dome Success Rate80-97% in recent conflicts

GMD Test Success55% in scripted tests

Twelve-Day War (2025)Over 500 ballistic missiles launched

1-Minute Revision

›PAC-3 MSE Cost: $4 million per interceptor
›Iron Dome Success Rate: 80-97% in recent conflicts
›Target this Data: PAC-3 MSE interceptor cost of $4 million per shot.
›Target this Nodal Body: U.S. Department of Defence (DoD) - ordering quadrupled production of THAAD and PAC-3 MSE interceptors.
›Target this Technology: 'Hit-to-kill' interceptor technology used in newer systems like Cheongung II and Patriot PAC-3 MSE.

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News Snapshot

🛡️

Integrated Defence Tested

The U.S.-Iran conflict acted as a live test for a newly integrated regional air and missile defence network involving systems from the U.S., Israel, South Korea, and the UAE.

⚖️

Cost vs. Efficacy Paradox

Advanced systems like Patriot are effective but expensive ($4M per shot), forcing militaries to 'ration' interceptors and adopt cheaper alternatives against saturation attacks.

🎯

Technology Evolution

Defence systems are evolving with hit-to-kill interceptors, 360° radar coverage (Cheongung II), and directed-energy weapons (Iron Beam) to counter drones and advanced missiles.

Detailed Analysis & Strategic Depth

Context / Background

Missile defence refers to military systems designed to detect, track, and destroy incoming missiles before impact. The concept gained prominence during the Cold War and has evolved into multi-layered architectures like Israel's Iron Dome, David's Sling, and Arrow systems, and the U.S.'s Patriot and THAAD. The recent conflict provides a real-world testing ground for these technologies against diverse threats, from ballistic missiles to 'suicide drones'.

Core Analysis & Implications

The analysis reveals a stark trade-off between capability and cost. While Iron Dome shows high success (80-97%) against simple rockets, systems facing advanced threats like hypersonic or maneuvering missiles (e.g., Patriot vs. modified Iskander-M) see success rates plummet to ~10%. This underscores the challenge of 'saturation attacks' where adversaries launch volleys of cheaper missiles to exhaust limited, expensive interceptor stocks. The deployment of systems like South Korea's Cheongung II with 360° launch capability and the U.S.'s new Indirect Fire Protection Capability highlights a shift towards more efficient, cost-effective defence solutions.

Future Outlook / Way Forward

The future lies in directed-energy weapons (like Iron Beam lasers), increased automation, and enhanced production capacity. A critical vulnerability exposed is the slow replenishment rate; replenishing THAAD interceptor stocks is estimated to take 1.5 years at current capacity. For India, this reinforces the need to indigenize and scale up production for its own BMD program. The strategic implication is that missile defence, while a crucial deterrent, cannot be the sole pillar of national security and must be part of a broader mix of diplomatic and offensive capabilities.

Key Facts at a Glance

PAC-3 MSE Cost$4 million per interceptor

Iron Dome Success Rate80-97% in recent conflicts

GMD Test Success55% in scripted tests

Twelve-Day War (2025)Over 500 ballistic missiles launched

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Practice exam-style questions based on this article.

Q1Static LinkageEasyUPSC, SSC

Which U.S. government department, as mentioned in the article, has quadrupled production orders for THAAD and PAC-3 MSE interceptors?

Q2Statement-basedHardUPSC

Consider the following statements regarding missile defence systems:

1. The U.S. Patriot system's PAC-3 MSE interceptors use 'hit-to-kill' technology.

2. Israel's Iron Beam is a high-energy laser system primarily used against ballistic missiles.

3. South Korea's Cheongung II system uses a Vertical Launch System allowing 360° engagement.

Which of the statements given above is/are correct?

Q3Data-centricMediumUPSC, SSC

According to the article, what is the approximate cost of one PAC-3 Missile Segment Enhancement (MSE) interceptor used in the Patriot system?

Q4Application/ImpactMediumUPSC, SSC

What is the primary strategic challenge, as discussed in the article, that leads militaries to 'ration' the use of advanced missile interceptors like the Patriot?

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Missile Defence Systems: Patriot, THAAD, Iron Dome Tested in U.S.-Iran Conflict; PAC-3 MSE Costs $4M per Interceptor

Exam Lens

Quick Exam Facts From News

1-Minute Revision

News Snapshot

Integrated Defence Tested

Cost vs. Efficacy Paradox

Technology Evolution

Detailed Analysis & Strategic Depth

Context / Background

Core Analysis & Implications

Future Outlook / Way Forward

Prelims Flashpoints

Key Facts at a Glance