This article is republished with permission from Laser Wars , a newsletter about military laser weapons and other futuristic defense technology. The cruise missile-killing high-energy laser weapon the U.S. Defense Department envisions as part of its ‘Golden Dome for America’ domestic missile defense shield is beginning to take shape. The new Joint Laser Weapon System (JLWS)—a collaboration between the U.S. Army and U.S. Navy whose existence  was first reported  in June 2025—will initially consist of a containerized 150 kilowatt system with potential to scale to at least 300 kw to defeat incoming cruise missile threats,  according  to the Navy’s fiscal year 2027 budget request. The system will also include Joint Beam Control System (JBCS) “capable of supporting” a 300-500 kw laser weapon, the documents say. The JLWS effort will leverage research and development lessons from the Navy’s 60 kw  High Energy Laser with Integrated Optical-Dazzler and Surveillance (HELIOS)  system, which is  currently installed  on the Arleigh Burke-class guided missile destroyer USS Preble, and the Army’s 300 kw  Indirect Fire Protection Capability-High Energy Laser (IFPC-HEL)  system, the first prototype of which the service  plans on taking delivery of  of later this year. The Navy will also “conduct upgrades” to its  High Energy Laser Counter Anti-Ship Cruise Missile Project (HELCAP)  testbed “as appropriate” in support of future JLWS testing. While last year’s Army budget request  detailed  $51 million in mandatory funding for JLWS through the “One Big Beautiful Bill Act” reconciliation bill under its ‘Expanded Mission Area Missile’ program element, this year’s request does not contain any R&D funding for fiscal year 2027 but details plans for $337.8 million in spending starting in fiscal year 2028 and running through fiscal year 2031. Based on the budget documents, it looks as though the service plans on closing out its IFPC-HEL activities first before kicking off its part of the JLWS effort. The Navy, however, isn’t waiting around. The service requested $94.825 million under its ‘Directed Energy and Electric Weapon Systems’ program element in fiscal year 2027 (up from just $14.5 million in fiscal year 2026, as  previously reported ) that includes $79.84 million under its Surface Navy Laser Weapon System (SNLWS) effort to jumpstart JLWS R&D, sustain the service’s lone HELIOS system for future testing activities, and upgrade the HELCAP testbed (which is also receiving a separate $14.978 injection),  according  to the service’s budget request. The service plans on investing an additional $243.3 million into JLWS R&D under that program element through fiscal year 2031. Together, the Army and Navy requests total a vision of $675.93 million in R&D spending for the JLWS through fiscal year 2031. The Navy plans on awarding $31.7 million in contracts for JBCS development as soon as the fourth quarter of 2026 and the $30 million in contracts for the procurement and testing of containerized JLWS by March 2027,  according  to budget documents. It seems likely that Lockheed Martin will receive those contract: not only is the defense prime the technical lead on both the HELIOS and IFPC-HEL efforts that will inform the JLWS, but it’s also already  developing a containerized version  of the former, a company executive  revealed  in August 2025. It’s worth noting that while the Pentagon’s fiscal year 2027 budget request also  contains  $452 million in R&D spending for the “development, integration, and assessment” of directed energy weapons in support of Golden Dome, the exact relationship with the Army and Navy’s JLWS efforts is unclear. The Navy budget documents state that the $79.84 million allocated under SNLWS also includes funds to “begin development of a consolidated implementation plan” for all Golden Dome-related directed energy projects, “leveraging synergy and common weapon architectures between these efforts where possible” in coordination with the U.S. Missile Defense Agency. The dream of a laser weapon capable of shooting down cruise missiles is nearly as old as the laser itself. The Pentagon  first demonstrated  the concept in the 1970s with the Navy ARPA Chemical Laser (NACL), a deuterium fluoride system developed by the Defense Advanced Research Projects Agency (DARPA) that successfully engaged small missile targets but proved far too large and complex for practical deployments. Those same challenges would  befall  its successor, the megawatt-class Mid-Infrared Advanced Chemical Laser (MIRACL), despite the system  successfully neutralizing  a supersonic MQM-8 Vandal missile during testing in 1989. The Gulf War briefly revived this dream in the U.S. Air Force’s ill-fated Airborne Laser (ABL) program, which  consumed  more than $5 billion over nearly two decades before its cancellation in 2012. More recently, the Navy’s Layered Laser Defense (LLD) system, developed by Lockheed Martin in conjunction with the Office of Naval Research,  successfully downed  a target drone simulating a subsonic cruise missile in a 2022 demonstration at White Sands Missile Range in New Mexico in the military’s latest attempt to validate the concept under realistic conditions. The Pentagon clearly hopes that the JLWS will finally push its laser-based cruise missile defense efforts over the finish line. But as  previously reported  when the JLWS first became public in June 2025, such threats pose a far more complex challenge for directed energy weapons than the low-cost weaponized drones that are reshaping warfare on battlefields from Ukraine to the Middle East. Cruise missiles fly low and fast, hug terrain, and execute evasive maneuvers that compress reaction time, while their hardened casings require far more sustained energy to defeat than the soft-bodied drones that current tactical lasers are optimized for. Compounding the challenge, atmospheric interference can scatter or absorb beam energy before it reaches the target; even at 300 kw power levels, laser weapons demand a degree of beam control and aim-point precision that no known system has yet demonstrated against a realistic cruise missile threat. After years  attempting  to scale laser weapons to power levels suitable for cruise missile defense, the Pentagon’s push for a containerized solution also represents a departure from past vehicle-mounted or warship-integrated systems. For the Navy in particular, Chief of Naval Operations (and  noted laser weapon champion ) Adm. Daryl Caudle has explicitly  emphasized  the pursuit of modular capabilities that the service can rapidly swap across its surface fleet for particular missions without lengthy and expensive stays in shipyards. Look no further than the service’s October 2025  live-fire test  of the Army’s 20 kw  Palletized High Energy Laser (P-HEL)  system, based on the LOCUST Laser Weapon System from defense contractor AV, from the flight deck of the Nimitz-class aircraft carrier USS George HW Bush. Indeed, the JLWS isn’t the only modular laser weapon the Navy is exploring. The aforementioned Directed Energy and Electric Weapon Systems program element also includes $4.82 million in funding to support the “development, integration and marinization” of the Army’s  Enduring High Energy Laser  (E-HEL) systems—the modular, 30 kw laser weapon based on lessons from P-HEL and the aborted Stryker-mounted 50 kw  Directed Energy Maneuver-Short Range Air Defense  (DE M-SHORAD) system that the service  envisions  as its first directed energy program of record. The Army planned on procuring two E-HEL units in fiscal year 2026 and another pair the following year,  according  to the service’s budget request, with  plans  to “produce and rapidly field” up to 24 systems total in the coming years. With its LOCUST system proven as a counter-drone capability both  abroad  and  at home , AV appears the leading contender to clinch that contract in the coming years. With institutional support for developing and fielding directed energy weapons at scale  at a historic high , JLWS may prove a significant opportunity for the Pentagon to finally make its dream of missile-killing laser weapons a reality. But the history of counter-cruise missile laser development is littered with programs that cleared every bureaucratic hurdle only to stumble on the physics and operational realities. A containerized 150 kw system may be a more modest and achievable goal than the behemoths that came before it, but whether JLWS can survive contact with both the budget process and real-world complexities of blasting cruise missiles out of the sky remains the open question. This article is republished with permission from  Laser Wars , a newsletter about military laser weapons and other futuristic defense technology.