Slow drones, expensive missiles, lasers, and multi-layered defense: NATO is rethinking its strategy in the face of an economic equation that has become unsustainable.
In summary
NATO is currently reviewing its air defense in the face of a threat that seems simple but is exhausting even the most sophisticated systems: slow, low-cost drones. The problem is no longer just tactical. It is also budgetary. When a Patriot interceptor costs around $4 million and an attack drone can cost between $20,000 and $50,000, the logic of traditional defense becomes difficult to sustain over the long term. Recent incidents on the fringes of allied territory, particularly in Romania, have reinforced this observation. The Alliance is therefore working on a multi-layered defense: improved detection, electronic warfare, cannons, short-range missiles, low-cost interceptors, and, increasingly, directed-energy weapons. Lasers won’t solve everything. They depend on weather conditions, line of sight, and available power. But they answer the question that all military leaders are now asking: how to shoot down a low-cost drone without crippling one’s own defenses.
The nature of the problem NATO can no longer ignore
For years, Allied air defense was primarily designed to counter conventional threats: fighter jets, helicopters, cruise missiles, and occasionally ballistic missiles. Slow-moving drones have changed the equation. They fly low, sometimes very low. They can be small, noisy, or, conversely, difficult to spot. They appear alone, in small groups, or in waves. Above all, they often require disproportionate resources to be neutralized.
The Alliance is not yet speaking of a total doctrinal revolution, but it clearly recognizes the need for a recalibration. On April 17, 2026, Admiral Pierre Vandier, Supreme Allied Commander Transformation, explained that the lessons learned from Ukraine and the conflict with Iran were pushing NATO to rethink its air surveillance. He used a very revealing phrase: the current war is also a “cost-war”, a war of costs, where one must think in terms of cost per shot, of the best way to alert, detect, and destroy at a lower cost than that of the enemy’s attack. This single sentence sums up the change underway.
Put another way, NATO can no longer reason as if every target were worth a high-end missile. This reasoning was tenable against a limited number of high-value threats. It becomes fragile in the face of swarms of drones or slow, replaceable objects. The sophistication of the defender is no longer enough. We also need stock depth, sensor density, and much cheaper effectors.
The concrete trigger from the eastern borders
This line of thinking did not come out of nowhere. It is fueled by repeated incidents on the Alliance’s periphery. On April 17, 2026, Romania reported that a drone had violated its airspace during a Russian nighttime attack on Ukraine, before radar contact was lost near Chilia Veche. Bucharest points out that this type of incident has already occurred several times since Russia began striking Ukrainian port infrastructure on the Danube. Romania shares a 650-kilometer land border with Ukraine, making it one of the most sensitive flashpoints.
This is not an isolated case. Reuters had already reported in the fall of 2025 on a wave of drone incursions and suspicious activity in Northern Europe, including disruptions at Danish and Norwegian airports, sightings over Danish oil fields in the North Sea, and disruptions to Dutch military exercises in Poland. The significance of these incidents lies not only in their presumed origin. It stems from the fact that they demonstrate how a slow or stealthy drone can trigger costly allied responses, disrupt civilian traffic, or interfere with normal military operations.
These incidents have an immediate consequence: they force allies to deal with an often ambiguous object. Is it a surveillance drone, a decoy, a loitering munition, a lost aircraft, a test operation, or a provocation? Until identification is certain, the chain of command must overreact rather than underreact. This is precisely what makes these threats so strategically effective. They cost the attacker little, but consume time, attention, personnel, and sometimes ammunition on the defensive side.
Multi-layered defense as the only serious response
The key word is multi-layered. It must be taken seriously. This means that no single system can handle the threat on its own. The idea is to stack multiple layers of response, each tailored to a specific aspect of the problem. The Alliance is already working in this direction, seeking to better integrate counter-drone capabilities with more traditional Air and Missile Defense architectures. The NATO Secretary General’s 2024 Annual Report also describes an exercise bringing together more than 400 participants from over 20 countries, with more than 60 technologies tested under real-world conditions, ranging from sensors to jammers and effectors. One of the explicit objectives was to verify the technical compatibility of counter-drone systems with existing air and missile defense capabilities.
A multi-layered defense generally relies on five key components. First, detection: radars adapted to small signatures, electro-optical, acoustic, and passive sensors. Next, identification: knowing what you’re looking at and who controls it. Then non-kinetic neutralization: jamming, takeover, or disruption of communications, as needed. This is followed by low-cost kinetic neutralization: cannons, programmable munitions, inexpensive interceptors, and sometimes interceptor drones.
Finally, the top tier remains: surface-to-air missiles and longer-range systems for faster, higher-altitude, or more dangerous threats.
This is precisely what a modern multi-layered defense means. We are not replacing high-end missiles. We are reserving them for targets that warrant their use. The real change, therefore, is not the abandonment of the Patriot, the SAMP/T NG, or long-range systems. The change is the creation of a dense, inexpensive, and responsive lower tier capable of absorbing the flow of slow drones before it moves up to the more costly layers.
The economic trap undermining Western defenses
This is where the budget issue becomes stark. Reuters notes that a Patriot interceptor costs around $4 million. In the same graphic summary, a THAAD interceptor is listed in the range of $13 to $15.5 million. Yet the Pentagon acknowledged as early as 2024 that destroying a one-way drone costing $50,000 with a missile costing $3 million was not a sound equation. Reuters also cites a cost of $1 billion or more in ammunition spent by the U.S. Navy since late 2023 to defend its ships in the Red Sea against low-cost Houthi drones and missiles.
The problem isn’t limited to the unit cost of the missile. Each interception also entails ongoing operational costs: crews, radars, maintenance, command networks, fuel, logistical support, flight hours, and naval or ground presence. A slow-moving drone often requires mobilizing an entire chain of command designed for more significant, rarer, and more predictable threats.
This reality explains why Europeans are taking action. On February 20, 2026, the five major European military powers—France, Germany, Italy, Poland, and the United Kingdom—launched the LEAP initiative, standing for Low-Cost Effectors and Autonomous Platforms. The stated goal is to begin production, within approximately 12 months, of low-cost air defense systems, such as autonomous interceptor drones or cheaper missiles. The first project is slated for 2027. This decision is a direct response to lessons learned from Ukraine: autonomous interceptors can offer a credible alternative to costly surface-to-air missiles.
The Growing Role of Lasers in This Overhaul
We must be precise. Lasers are not yet NATO’s miracle solution. But they are clearly becoming one of the technological priorities in the debate, because they better meet the cost-per-shot logic than other options. Once the initial investment is recouped, a laser shot costs far less than a missile. This is their main strategic advantage.
The United Kingdom is making rapid progress in this area. In November 2025, London awarded MBDA UK a £316 million contract for DragonFire systems intended for the Royal Navy.
British authorities estimate a cost of approximately £10 per shot and plan to begin integrating the system onto Type 45 destroyers starting in 2027. The benefit is clear: engaging drones at a high rate of fire without expending Sea Viper missiles or other expensive munitions.
Germany is pursuing a parallel path. Rheinmetall and MBDA Deutschland announced in late 2025 that an operational laser system could be available to the German Navy starting in 2029, following more than 100 live-fire tests. The manufacturer notes that this type of system complements cannons and guided missiles, particularly against drones and drone swarms. This is exactly the application that European military leaders are interested in today.
France, too, is advancing its work on anti-drone lasers with HELMA-P, although recent official communications remain less detailed on the industrialization timeline than the British or German announcements. More broadly, in March 2026 Thales launched its SkyDefender architecture, an integrated multi-layered defense system combining ForceShield for short-range threats such as drones, SAMP/T NG for medium range, and long-range radars. This clearly demonstrates that the solution is not the laser alone, but the laser integrated into a comprehensive architecture.
The limitations that directed-energy weapons will not eliminate
It would be misleading to market lasers as a panacea. First, they remain line-of-sight systems. Second, their performance is sensitive to atmospheric conditions, turbulence, aerosols, rain, fog, and dust. Finally, they require a power supply, high-precision aiming, and a highly reliable sensor chain. In a congested, cluttered, or severely degraded environment, their performance may be reduced.
Above all, a laser does not replace a multi-layered system. It handles drones well—sometimes swarms, sometimes fast-moving targets at close range. But it cannot, on its own, cover the entire spectrum, from rudimentary loitering munitions to complex cruise missiles. This is why the architectures emerging in Europe almost always combine several families of effectors: electronic warfare, cannons, missiles, interceptor drones, and directed energy.
It would therefore be a mistake to believe that NATO is seeking a single successor to the missile. Rather, it seeks to reduce reliance on missiles, to avoid using them where other solutions suffice, and to rebuild a rational hierarchy of defense costs. This is far more realistic.
The Strategic Implications for the Alliance
The ongoing review goes beyond mere technicalities. It forces the Alliance to rethink its operational culture. Effective air defense against slow drones does not depend solely on good radar or a good laser. It depends on the ability to share data quickly, delegate certain decisions, shorten decision-making chains, and accept solutions that are less prestigious but more sustainable.
NATO has, in fact, accelerated its testing programs. In March 2026, its Innovation Range in Latvia launched an initial TEVV campaign on UAS and C-UAS technologies, featuring tests of high-speed interceptors and electronic warfare solutions in an open environment. This type of campaign demonstrates that the Alliance aims to shorten the gap between technical demonstration and operational use.
The lesson is harsh, but useful. The slow drone forces the major powers to become frugal, selective, and inventive once again. It is not the most impressive weapon that sets the pace. It is the one that forces the adversary to spend too much, too often, too quickly. If NATO wants to hold its own in an aerial war of attrition, it will have to learn to take down targets for a few hundred or thousand euros—targets it still too often neutralizes at a cost of several million. Lasers will play a key role in this shift. Interceptor drones will too. But the real change will be doctrinal: accepting that the air defense of the future is won as much through cost management as through firepower.
Sources
NATO, Secretary General’s Annual Report 2024.
NATO, New NATO Innovation Range starts counter-drone technology testing in Latvia, March 18, 2026.
Breaking Defense, NATO revamps air surveillance approach for the “cost-war” of low-flying drones, missiles, April 17, 2026.
Reuters, Romanian defense ministry says radars caught Russian drone breaching airspace, April 17, 2026.
Reuters, NATO says Russian incursions deterred but hybrid threats persist, October 22, 2025.
Reuters Graphics, Cheap drones are reshaping the war in the sky, March 16, 2026.
Reuters, Europe’s main military powers to develop low-cost air-defense systems, February 20, 2026.
Reuters, UK and European allies to develop low-cost air defense weapons, UK says, February 20, 2026.
Reuters, France’s Thales launches European anti-missile defense dome, March 11, 2026.
Rheinmetall, Rheinmetall and MBDA: German laser weapon system close to market readiness, October 28, 2025.
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