Israel killed Ayatollah Ali Khamenei, Iran’s supreme leader of 37 years, in a strike on Tehran on February 28, 2026. The weapon reportedly used was the Blue Sparrow, an Israeli air-launched ballistic missile developed by Rafael Advanced Defense Systems.
To understand why this missile was so difficult to stop, you need to understand how it works.
WHAT EXACTLY IS THE BLUE SPARROW MISSILE?
The Blue Sparrow is part of a family of three air-launched ballistic target missiles, which also includes the Black Sparrow and the Silver Sparrow. Ballistic missiles are rocket-powered weapons that race steeply upward before cutting their engines and falling toward their target under gravity, much like a ball thrown high into the air.
The Blue Sparrow, Black Sparrow, and Silver Sparrow were built as practice targets for Israel’s Arrow missile defence system. Arrow is Israel’s shield against ballistic missiles, designed to detect and destroy incoming threats before they hit the ground.
Think of the Sparrow missiles as dummy threats fired into the sky, so Arrow could practise knocking them out.
According to Rafael’s official datasheet, the Blue Sparrow measures 6.51 metres in length and weighs 1,900 kg. It uses a single-stage solid rocket propellant and is guided by a dual GPS and INS navigation system.
INS, or inertial navigation system, is an internal compass that continuously tracks the missile’s own movement without relying on any external signal. For scale, the missile is roughly the length of a London bus.
HOW DOES THE BLUE SPARROW TRAVEL THROUGH SPACE?
The Blue Sparrow is built to fly like the kind of missiles that countries such as Iran actually use in warfare, including the Shahab and the SCUD series. This makes it a convincing stand-in during defence tests.
Here is how it flies. A fighter jet releases the missile at high altitude. The missile then shoots steeply upward, briefly grazing the edge of the atmosphere, before a smaller section at the front breaks away and falls almost straight down toward the target.
That falling section is called the re-entry vehicle, and it carries small built-in thrusters that keep it on course all the way down.
That steep, nearly vertical drop is what makes the Blue Sparrow so hard to stop. Most air defence systems are designed to watch the horizon for threats coming in at an angle.
A missile dropping almost straight down from above, at several times the speed of sound, is a completely different problem. By the time a defence system spots it, there is almost no time left to react.
HOW WAS BLUE SPARROW USED IN US-ISRAEL-IRAN CONFLICT?
When Israeli strikes hit Tehran on the morning of 28 February 2026, there were large explosions across the capital, with thick plumes of smoke visible over the city.
Israel’s military confirmed it had carried out a preemptive strike on Iran and said the operation was fully coordinated with the United States. Israel called it Operation Roaring Lion. The Pentagon called it Operation Epic Fury.
Reuters, citing a senior Israeli official, reported that Khamenei’s body had been found at his compound in central Tehran. His death was confirmed on 1 March 2026.
Iran announced 40 days of national mourning. Khamenei had run Iran with absolute authority over its government, military, and courts since 1989.
HOW DID BLUE SPARROW GIVE BIRTH TO ONE OF THE WORLD’S DEADLIEST MISSILES?
The Blue Sparrow was always a practice missile, a dummy threat fired into the sky, so Israel’s Arrow defence system could sharpen its aim. But Rafael did not stop there. The company took the same technology and built ROCKS, a fully combat-ready missile designed to seek out and destroy real targets.
ROCKS can be launched from a safe distance and still hit its target with extraordinary precision, even in environments where GPS signals are being jammed by the enemy.
It can strike targets on the surface or buried underground, in any weather, day or night. It carries a warhead of up to 500 kg and lands within just 3 metres of its target. To put that in perspective, 3 metres is roughly the width of a standard car. The Blue Sparrow was the sketch. ROCKS is the finished weapon.
