US-Iran Crisis: The Khorramshahr 5 Nuclear-Fueled ICBM
In the midst of the ongoing crisis, the geopolitical discourse has largely moved past the "Khaibar Shekan" missile. The primary focus and the most pressing question now revolves around the Khorramshahr family of missiles. While Iran officially discusses only the 4th generation, rumors and strategic leaks increasingly point to the existence of the Khorramshahr 5.
This development has profound implications. The newest iteration within the Iranian missile family could be classified as Iran's first Intercontinental Ballistic Missile (ICBM). According to leaked and announced specifications as of early February 2026, its operational range approaches 12,000 kilometers, granting it the capability to strike deep into the North American continent.
The Technical Leap: From Khorramshahr 4 to 5
To understand the magnitude of this threat, we must look at its predecessor, the Khorramshahr 4 (also known as the Khaibar Shekan). Revealed by the Iranian Ministry of Defense in May 2023, the 4th generation is one of Iran's most advanced ballistic missiles.
It boasts a 2,000-kilometer range, weighing between 20 to 30 tons and measuring 13 meters in length. It carries a massive 1,800 kg warhead—nearly equivalent to the destructive power of American GBU-57 bunker-buster bombs. Iranian sources confirm it can carry submunitions capable of targeting up to 80 different objectives simultaneously. It reaches hypersonic speeds of Mach 16 outside the atmosphere and Mach 8 inside, cutting the flight time from launch to impact down to a mere 10 to 12 minutes.
It utilizes the advanced "Arvand" hypergolic liquid-fuel engine, allowing the missile to be stored fueled for years and reducing launch preparation time to under 15 minutes. Crucially, its mid-course guidance system operates outside the atmosphere and shuts down upon reentry, rendering it highly immune to electronic warfare (EW) jamming.
The Khorramshahr 5 represents a monumental qualitative leap over the Khorramshahr 4. It differs entirely from the solid-fueled Sejjil or the hypersonic Fattah. The central question terrifying Western intelligence is: Did Iran conduct tests or induct the Khorramshahr 5 into its underground "Missile Cities" during 2025 and 2026?
The Nuclear Dilemma: Warhead vs. Propulsion
The most critical and sensitive aspect of the Khorramshahr 5 revolves around a specific technological distinction: the difference between a nuclear warhead and nuclear fuel (propulsion).
No one is currently arguing that Iran has placed a nuclear bomb (warhead) on this missile. The debate centers entirely on whether the Khorramshahr 5 utilizes a nuclear reactor for propulsion.
There are two main categories in this advanced tech space. The first includes standard nuclear-armed ballistic missiles like the Chinese DF-26 or the Russian Yars. The second, far more elusive category, consists of cruise missiles with unlimited range powered by nuclear thermal engines designed for deep-space travel or indefinite atmospheric loitering.
Russia was the first to announce successful tests of such a weapon—the Burevestnik (Skyfall)—in late 2025. President Putin described it as a unique innovation that uses a miniature nuclear reactor to heat air passing through the engine, generating jet thrust. This allows the missile to stay airborne for years, flying at extremely low altitudes to indefinitely evade air defenses.
America's True Fear: Reaching North America
Did Iranian development reach this level of nuclear propulsion? The American "Draco" project was completely frozen by President Trump, originally initiated to counter and destroy Iran's potential arsenal. Because Russia is an established nuclear state, the US cannot easily roll back its capabilities. Therefore, Washington focuses its aggressive posture entirely on Iran to prevent it from acquiring this strategic equalizer.
The true reason the US is panicking over the Khorramshahr 5—as hinted by official Iranian media reports—is the fear that Iran is developing nuclear or hydrogen-fueled propulsion that can propel a heavy payload directly to North America. While the US hopes the missile still relies on liquid fuel, the uncertainty is driving aggressive diplomatic and military posturing.
The Strategic Shift and Global Realignment
The United States desperately wants to drag the missile issue onto the nuclear negotiation table. Washington’s ultimate goal is to secure a binding agreement that completely removes the possibility of nuclear fuel propulsion from Iran's missile program, mirroring the restrictions placed on missiles during the Obama-era agreements.
However, the geopolitical landscape has shifted. Following the recent US and Israeli aggression during the "12-Day War," the guarantees that previously constrained Iran are gone. For the Iranians, these missiles have transitioned from standard military assets to existential strategic deterrents for self-defense.
While the US focuses singularly on eliminating the nuclear fuel threat for its own national security, it has left the rest of the regional conflict to Benjamin Netanyahu, giving him a green light to continue his war against Iran. This division of labor makes the situation exceedingly dangerous.
In response to this escalating threat, the US has radically repositioned its forces. It has completely emptied the Diego Garcia military base, transferring assets to Eastern Europe. Furthermore, fighter squadrons originally destined to support Ukraine have been diverted to the Middle East to complete missions against Iran.
Conversely, Russia is standing firmly alongside Iran, with visible military presence in Bandar Abbas and the Strait of Hormuz. This massive realignment of global forces highlights the immense weight of the Khorramshahr 5 in the delicate balance of power in this critical historical phase.
Note: This article is part of our Political Economy series, providing deep strategic analysis on global macroeconomic and geopolitical shifts.