Iran Fires Missiles at Diego Garcia, Both Fail
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- Iran fired two ballistic missiles on March 20, 2026, at Diego Garcia — a joint US-UK military base in the Indian Ocean roughly 2,500 miles away, about twice Iran's declared top ballistic missile range, according to US, UK and Israeli officials.
- US missile defenses apparently destroyed the second missile while the first broke apart during flight, and Iran has denied responsibility for the launches.
- The Khorramshahr missile, an Iranian intermediate-range weapon with a declared range of up to 1,250 miles, was likely modified with a reduced payload to reach 2,500 miles — a simpler extension path than building a new missile.
- Israeli and US air defenses intercepted nearly all of the hundreds of missiles and drones Iran launched at Israel in December 2025, a pattern that reinforces the assessment that Iran's intermediate-range weapons do not pose a significant military threat.
- The in-flight failure of the Diego Garcia missile suggests Iran may be operating these systems at distances beyond their proven reliability, per University of Colorado Boulder aerospace engineering professor Iain Boyd.
- A two-stage rocket capable of 2,500 miles is among Iran's most expensive weapons, meaning it likely has very few — and small salvos remain highly vulnerable to sophisticated US and allied interceptors.
Why it matters: Iran reached a critical US-UK base at double its previously declared missile range, proving reach if not reliability: both Diego Garcia missiles failed or were intercepted. The launch was almost certainly aimed at political and psychological signaling, and it will likely intensify diplomatic pressure to resolve the conflict with Iran before further escalation.
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