The Iron Dome Gap: Why Tel Aviv Is Still Getting Hit Despite Israel's Air Defence

Israel has the world's most advanced air defence system. Iranian missiles are still hitting Tel Aviv. Here is the specific technical limitation that explains why perfect defence is impossible.

The persistent question in coverage of the Iran-Israel conflict is: if Israel's air defence is so advanced, why are Iranian missiles still hitting Tel Aviv? The answer requires understanding what layered air defence systems can and cannot do, and why the specific Iranian missile inventory presents challenges that even the world's most sophisticated defence architecture cannot fully resolve.

The Iron Dome system that most people associate with Israeli air defence is specifically designed for short-range rockets — the kind that Hamas and Hezbollah fire, with range under 100 kilometres and relatively predictable flight paths. It is extremely effective against this threat category, intercepting approximately 90 percent of rockets that it engages. Against ballistic missiles from Iran, which travel at higher velocities, on steeper trajectories, and over much longer distances, Iron Dome is the wrong system — it is not designed for this mission and does not attempt it.

The systems designed for ballistic missile defence are Arrow-2 and Arrow-3 — Israel's upper-tier systems that engage at higher altitudes and longer distances. These are the systems intercepting Iranian ballistic missiles, with success rates that have been good but not perfect. The specific failure modes involve two categories: saturation (enough simultaneous missiles to exceed the available interceptors at a given moment) and trajectory geometry (specific launch angles from specific Iranian locations that challenge the engagement geometry of the interceptors).

The debris problem compounds this. Even successfully intercepted missiles produce debris that continues toward the ground, potentially causing casualties and damage distinct from the original warhead impact. Israel has experienced deaths and injuries from debris that Israeli air defence considers a 'successful intercept' by its own metrics.

For European governments considering their own air defence requirements, Israel's experience provides specific data: even the most sophisticated layered air defence system in operational use cannot prevent all missile impacts or all casualties from a sustained ballistic missile campaign. The system's value is in reducing the rate of effective impacts — not eliminating it.