In February 2010, a modified Boeing 747-400F aircraft, equipped with a powerful chemical laser known as the YAL-1 Airborne Laser, successfully destroyed two missiles during their propulsion phase. This marked a significant milestone in the development of directed-energy weapons, which use concentrated light to disable targets. The YAL-1 was designed to intercept ballistic missiles in their early flight stages, a concept that emerged during the first Gulf War (1990-1991), when Iraq's Scud missile attacks highlighted weaknesses in Western air defenses. The YAL-1 was developed by the American Missile Defense Agency, with Boeing leading the project and support from Northrop Grumman and Lockheed Martin. The aircraft was a completely remodeled version of the 747-400F, fitted with a chemical iodine-oxygen laser (COIL) capable of producing up to a megawatt of power. Initially, the plan was to build a fleet of seven such aircraft to patrol near potential enemy borders, but only one unit was ever completed. During its operational life, the YAL-1 demonstrated its effectiveness by destroying a solid-fuel ballistic missile and a liquid-fueled Scud missile in successful tests. Despite these technical achievements, the program faced significant challenges. The YAL-1 had a limited range of 200 to 300 kilometers, requiring it to operate close to enemy airspace, which made it vulnerable to attack. Additionally, the program's total cost over sixteen years was estimated at around 5 billion dollars, a factor that contributed to its cancellation. In 2012, the YAL-1 was retired from service and stored at Davis-Monthan Air Force Base in Arizona. The YAL-1 was eventually scrapped in 2014, though some of its components were recycled and repurposed. Parts of the aircraft were used in the upgrade of Air Force One, the presidential aircraft, and in the NASA SOFIA flying telescope, which studies the universe from high altitudes. The reuse of these components saved approximately 15 million dollars for American taxpayers. While the YAL-1 program did not achieve long-term operational deployment, it provided valuable insights into the potential of laser-based missile defense systems.