Israel’s long penetration war pays off

Initially, Israel tracked bodyguards' cell phones to locate VIPs, but this method was compromised after the June war last year, forcing Israeli intelligence to go back to the drawing board—which it did. Israel tracked one simple pattern: which bodyguard typically accompanied which VIP. That routine turned a security measure into an access point—one that could, and was, used against the Islamic Republic.

Unit 8200

The bulk of this endeavour was carried out by Israel's vaunted Unit 8200, the Israeli equivalent of the NSA. The unit has been at the forefront of Israel's vast intelligence war against Iran, with the role of maintaining a "live" overview of key targets that could (or have) been marked for elimination. Unit 8200 has also been one of the early adopters of AI, even before Chat GPT made it famous, using machine learning to sift through the kind of data it would have had access to through cameras and cell phones. By doing so, the unit provides Israel with a "predictive" map that can be used to specifically identify windows of opportunity —the kind that opened on Saturday.

Israel's Unit 8200 had also deeply penetrated Tehran's mobile phone networks. On the morning of the strike, cellular service on Pasteur Street was selectively manipulated: phones didn't go dead, but returned busy signals when called, preventing anyone from warning Khamenei's team that missiles were inbound.

Twelve cellular antennas were penetrated, giving Israel temporary control of communications. Through continued collection, the unit can also check for specific patterns that signal certain events—such as a high-level meeting preceded by a set of phone calls between specific officials—building a social network map of different nodes and how they interact on a daily basis.

This map also serves to potentially track and disrupt the Iranian response to such a major event, with the aim of monitoring follow-up targets, creating panic and uncertainty, and blunting the Islamic Republic's ability to respond both against Israel and by protecting its VIPs. The US later exploited the intelligence picture provided by years of Israeli penetration to launch its own cyber attacks, in an effort to amplify the initial impact of the attack on Iran's chain of command.

Critical CIA role

The CIA added a critical final piece. A human intelligence source confirmed that Khamenei would be at the compound that morning and who would be joining him. When Israeli sensors detected the scheduled meeting proceeding as expected, the strike was moved forward.

The CIA's involvement also helped validate the attack: a second, sovereign stream of confirmation that reduces the risk of a catastrophic miss and makes it easier to commit to an irreversible escalation. Not all assassination attempts are successful, as Israel discovered in Doha last year, and starting the war with a miss may well have galvanised the Islamic Republic. The Israeli doctrine requires that at least two separate intelligence officers (from different fields of collection) confirm a person's location before an attack can be considered. Cross-national operations require further confirmation, which the CIA source provided promptly.

Thirty missiles hit the compound. Khamenei's body was found in the rubble. Defence Minister Aziz Nasirzadeh, IRGC Commander Mohammad Pakpour, Armed Forces Chief of Staff Abdolrahim Mousavi, and former SNSC secretary Ali Shamkhani were also killed in the first wave.

In addition to Khamenei's compound, Israel appears to have launched even broader attacks targeting Khamenei's son, Mojtaba, as well as former President Mahmoud Ahmadinejad. In doing so, Israel and the US were likely trying to eliminate potential successors (as Mojtaba is now predicted by some sources to replace his father), and outsiders who could help reorganise the regime in a more unpredictable way.

Early reports claimed Khamenei was not at the leadership compound. Later confirmation suggested the opposite: he was in the most predictable place he could be.

Death wish?

Iranian media and sympathetic commentators have tried to turn that exposure into a virtue. They framed Khamenei's public calm and his apparent disregard for extra precautions as proof that the Supreme Leader did not prioritise his own survival. The message is that the Islamic Republic is resilient, able to endure even if Khamenei dies.

There is a kernel of truth here: his death, even from natural causes, would not be a complete shock, given his age and recurring health concerns. Succession has been debated for years inside the system. But that does not mean those internal struggles are resolved, or that Khamenei was simply "waiting for death."

At the tactical level, the obvious question is why he wasn't in one of the bunkers where he has reportedly spent increasing amounts of time. Yet the last major Israeli decapitation strike, the opening move in last year's 12-day war, targeted a bunker as well. Living in bunkers and dying in one may have felt like a trap rather than a form of protection; Khamenei may have chosen to take his chances above ground.

A related puzzle is Tehran's insistence on in-person meetings. That too has a rationale: Israel's penetration of Iranian (and broader "Axis of Resistance") communications makes remote coordination vulnerable, pushing leaders toward physical contact even when it increases personal risk.

Iran's immediate response was decent. Redundant command pathways enabled quick missile launches after the strike, and that worked in the narrow sense of speed. But attempts to fire large, synchronised barrages of 30–50 missiles repeatedly fell short because many launchers were damaged by Israeli unmanned "hunter" drones operating over Iranian territory. The initial decapitation strike was followed by hours of ballistic-missile hunting, enabled in part by refuelers positioned close enough to sustain persistent air operations.

The larger point is that repeated Israeli successes are not the product of a single intelligence coup. They reflect an institutional penetration campaign built over decades. Since the early 2000s, Israel has treated the Islamic Republic as its central strategic problem and invested accordingly. This war looks, from the vantage point of Israel's intelligence services, like the culmination of long preparation: patient recruitment, mapping, and enabling operations designed to create an opportunity for a decisive blow against Iran's principal regional power base.