When a missile struck the passenger terminal at King Khalid International Airport in Riyadh on October 10, killing 13 people, followed by another projectile that hit the same terminal the next day, an old question resurfaced: having spent tens of billions of dollars on armaments, what has Saudi Arabia actually bought? While the loss of civilian lives is an unmitigated tragedy, simplistic or hasty analyses of what happened, such as crying “failure” the moment a breach occurs, rest on a flawed premise: that air defense systems are acquired with the expectation of preventing every single attack.
No nation in the world has that level of invulnerability—not Israel, nor the U.S., nor the European member states of NATO. This renders the standard of “absolute protection” an inappropriate metric. The core question is this: has the Saudi defense system evolved to keep pace with the threats the Kingdom has faced for over a decade?
Modern air defense systems are not designed to intercept every incoming projectile. Rather, they are engineered to minimize the probability of a breach, by distributing risks across multiple layers—including radar networks, interceptor missiles and command centers. Consequently, the real standard for evaluating such systems is not whether anything gets through, but rather, the proportion of incoming threats that are successfully intercepted, in light of the nature and complexity of those threats.
This highlights the first problem in the ongoing debate over statistics. While the Saudi-led coalition in Yemen has occasionally announced the interception of missiles and drones, there is no published, systematic record of these interceptions—nor any data on interception rates—over the course of the current escalation. This information gap does not serve the Kingdom’s interests. It leaves the field open to two extreme narratives: one of “failure to intercept,” and the other asserting that “everything is under control.” Documenting interception rates—even imperfectly—is crucial, as it serves to rebut ill-informed judgments.
The complexity of ensuring total protection for Saudi territory stems not just from its vast geographical area. Air defense systems cannot cover every square mile of territory, but are designed to protect specific, strategic sites. The challenge lies in the fact that these vital assets are widely dispersed. The southern airports in Jazan, Abha, and Najran are located just minutes away from air defense launch sites, while the Rabigh and Yanbu refineries along the Red Sea are situated to the west. Critical assets and a refinery are located in Riyadh, in the center, while major energy facilities are concentrated in the Eastern Province, on the Arabian Gulf. This geographic fragmentation necessitates the distribution of air defense batteries across a broad front, which reduces the density of protection around any single target. Consequently, those managing the air defenses must make difficult choices about which assets to shield with comprehensive, multi-layered defense systems, and which receive less robust protection.
The Varied Nature of Security Threats
Israel has one of the world’s most advanced air defense systems, consisting of three primary layers: the Iron Dome for short-range rockets, projectiles, and drones; David’s Sling for medium-range threats; and the Arrow (“Hetz”) system for long-range ballistic missiles. These layers operate within an integrated warning and tracking network linked to the U.S., defending assets that are concentrated across a limited area—Israel spans only 22,000 square kilometers (roughly one percent of Saudi Arabia’s total land area).
Despite all this, Israel has not achieved absolute protection against major Iranian attacks. While the Israeli military—in coordination with its allies—claims to have intercepted 99% of the missiles and drones launched by Iran, it acknowledges that some ballistic missiles reached the Nevatim airbase. Yet dozens of projectiles still managed to penetrate its defenses, striking populated areas, military sites and infrastructure. If a state with this sophisticated defensive architecture, and Western backing, cannot prevent every breach, then expecting any other nation to do so fails to account for the realities of modern warfare.
That said, any such comparison still requires analytical rigor. While Israel may face barrages of hundreds of heavy ballistic missiles in a single night, Houthi barrages are smaller in scale and might, in theory, be easier to intercept. Yet scale aside, the threat facing Saudi Arabia is of a different nature, for several reasons. First is the warning time; launch sites in northern Yemen are close to cities in southern Saudi Arabia, leaving only a few minutes between the detection of a projectile and its impact. The threat landscape is also mixed: it includes slow-moving, low-altitude drones and cruise missiles that hug the terrain, alongside ballistic missiles. Each of these requires distinct detection and interception methods. Furthermore, the sustained nature of these attacks, which continue for weeks and target diverse locations, rather than occurring as isolated launches in a single theater, places an immense strain on both stockpiles and personnel.
Given these nuances, the comparison serves as a compelling argument, rather than highlighting a flaw: no state is fully immune to aerial attack, and the threat facing the Kingdom is uniquely complex.
Characterizing the Houthis as an unsophisticated, local militia fails to capture the true nature and scale of the threat. The missile and drone capabilities they employ are not the product of an independent Yemeni industry; successive reports by the UN Panel of Experts on Yemen have shown that the designs for many of these weapons are of Iranian origin, and that their components are smuggled in via networks managed by the Iranian Revolutionary Guard Corps (IRGC), supplemented by dual-use commercial components—many of Chinese origin—procured on the open market.
Nor does the threat emanate from a single direction. Saudi Arabia has said that the September 10-11 strikes on the East-West oil pipeline were carried out by drones launched from Iraq—not Yemen. This underlines the fact that Saudi defenses must monitor multiple fronts simultaneously, and this changes the nature of the confrontation: the Kingdom is not facing down a non-state actor with limited capabilities, but rather an extension of a regional threat that operates through a network of proxies. These are often covert adversaries—lacking both conventional military budgets and exposed industrial infrastructures that could be targeted. They use asymmetric and relatively inexpensive capabilities and can be flexible in choosing the locations and timings of strikes.
The Dilemma of Exorbitant Costs
The cost equation remains one of the most difficult challenges regarding air defense systems globally. An interceptor missile can cost millions of dollars, while a drone may cost only a few thousand. This issue is not unique to the Kingdom; the U.S. Navy has encountered it in the Red Sea, Israel faces it vis-à-vis Iranian missiles, and Ukraine confronts it in the face of Russian drones and missiles.
Consequently, the depletion of interceptor stockpiles—and requests to allies for replenishment—is now common to protracted conflicts, and does not in itself reveal a defensive flaw. However, this very dilemma highlights where defense spending should be directed. No nation can win a war of attrition by using multi-million-dollar missiles to counter inexpensive drones. The only sustainable solution lies in implementing cost-effective, multi-layered defense systems—such as radar-guided guns, electronic warfare and interceptor drones—to neutralize low-cost threats, thereby reserving high-end, expensive missiles for the threats that truly warrant them.
Most critics focus this debate on a single moment: the act of shooting down a projectile in mid-air. Yet modern air defense is far broader, resting on three additional elements that are each as critical as interception itself. The first is that of striking the sources of the threat: hitting launch platforms, missile stockpiles and supply lines before a launch can even take place, because every platform destroyed on the ground neutralizes missiles that will never need to be intercepted. Next comes the fortification and distribution of critical infrastructure, incorporating redundancies and backup operational nodes such that an attack on one facility does not cripple an entire sector. Third is rapid recovery: the capacity to resume operations quickly, thereby ameliorating the knock-on impact of an attack.
Aramco’s restoration of its production capacity within weeks of the Abqaiq attack serves as a metric of success no less significant than the interception rate. The attacker’s objective is not only military. Even if most incoming projectiles are intercepted, one strike on an airport or a refinery can inflict a psychological and economic toll far disproportionate to its cost: grounding air traffic and fueling investor anxiety, even as the Kingdom actively seeks to open up to tourism and foreign investment. Responding to this form of warfare requires more than just interception. It requires demonstrating that an attack cannot bring operations to a standstill for long.
In conclusion, wealth cannot purchase absolute immunity—neither for Saudi Arabia, nor for Israel, the U.S., or Europe. To judge the Saudi defense system by the standard of “zero breaches” is to hold it to a benchmark that no nation in modern military history has ever achieved.
