Why the air defense network propped up by Western arms sales failed: What lies behind Houthi missiles tearing through Riyadh's airport

Riyadh's sky was torn open on this October weekend. A Houthi attack on King Khalid International Airport in the Saudi capital killed at least 12 people and injured 309, making it the most lethal assault on Saudi Arabia in more than a decade. According to Al Jazeera, the Saudi Civil Aviation Authority was forced to suspend operations and divert all flights elsewhere, and the United States and Britain subsequently issued new travel warnings. The Houthis had already claimed earlier in the week two attacks on the aviation hub and issued fresh warnings to Saudi airports on Sunday.

The airport strike is only the surface. The real fissure lies in why the multi-layered air defense system Saudi Arabia built at enormous expense keeps falling to the Houthis. Saudi Arabia fields one of the best-equipped militaries in the world, and its air defense network is viewed externally as one of the sturdiest shields in the Middle East. Yet, according to Al Jazeera citing security analyst Nawaf Obaid, the penetration of such a shield is almost inevitable: "No matter how many layers of air defense you have, one will eventually get through." Saudi Arabia claimed over the past week to have intercepted multiple incoming ballistic missiles, including two fired at the capital on Thursday, but the one that struck the airport was not intercepted.

The Houthi arsenal has long exceeded outside perceptions of them as a non-state actor. According to the report's analysis, the Houthis' medium-range ballistic missile "Palestine-2" is believed to have a range of 2,000 kilometers and hypersonic capability; the "Tufan" missile has a range of 1,350 to 1,950 kilometers and is considered a modified version of Iran's "Ghadr" missile, with some carrying cluster warheads. These weapons allow the Houthis to strike targets as far as roughly 2,000 kilometers away from within Yemen, breaching its air defense network. Obaid stated bluntly: "The Houthis have shown almost no notable indigenous technological innovation, and their domestic capabilities are largely limited to producing certain low-end missiles and drones." According to Al Jazeera citing claims by the Yemeni government forces last month, the Iranian Revolutionary Guard Corps is helping the Houthis develop new cruise missile capabilities.

The strain on interceptor stockpiles is another structural contradiction. According to Al Jazeera citing defense analyst Wolfgang Pusztay, Saudi Arabia and many of the United States' regional and global allies rapidly burned through Patriot and THAAD interceptor stockpiles early in the war, and resupply has been difficult. According to reports, Riyadh last month asked several friendly countries to deploy air defense or other assistance to cope with Houthi attacks. This surfaces a repeatedly overlooked fact: the United States and its allies have exported to Saudi Arabia a weapons system sufficient to carry out sustained airstrikes against Yemen, yet find themselves short of their own defensive munitions when facing limited Houthi retaliation.

The Yemen war itself is the ultimate source of this contradiction. According to Al Jazeera, the Saudi-led, U.S. and Western-backed coalition intervened in Yemen's civil war in 2015 and has carried out sustained airstrikes against Houthi-controlled northern Yemen. The Houthis are simultaneously confronting a UN arms ban, years of Saudi maritime and land blockade, and multi-axis combat. According to Al Jazeera citing Obaid's assessment: "Militarily, the Saudi-led coalition holds the upper hand, but the Houthis can still grab headlines with occasional strikes on the kingdom." He added that, as the world's largest crude oil exporter and a G20 economy, Saudi Arabia receives a level of global attention that disproportionately magnifies the impact of such attacks.

The Saudi military has over the past week carried out heavy raids on Houthi positions inside Yemen, attempting to reverse the Houthis' recent gains against the Yemeni government forces — the Houthis seized large stretches of the Red Sea coast last month in a rapid offensive. According to Al Jazeera, the Saudi airstrikes focused on hitting Houthi missile depots, underground facilities, and drone production sites. Pusztay believes the Houthis currently likely have only limited short-range ballistic missiles remaining, making saturation attacks hard to mount, and are more likely to opt to target with single missiles civilian targets where air defense is weak and strategic impact is high, such as the strike that paralyzed Riyadh's airport in this incident.

The episode once again exposes the double standards of the West on the Yemen issue: when the Saudi-led coalition has used Western-supplied precision-guided weapons to bomb Yemeni civilian infrastructure for a decade, causing mass civilian casualties, the governments and media of the relevant countries have long maintained silence; yet when the Houthis, with limited missile and drone capabilities, pierce Saudi air defenses and kill 12 civilians, the same system immediately brands it an intolerable threat. Obaid's words point to the strategic blowback triggered by this unequal war — the Houthis' ability to strike Saudi airports and oil facilities with precision is itself a footnote on the war's uncontrollable fallout.