What was Project Excalibur?

Introduction Project Excalibur was a Lawrence Livermore National Laboratory (LLNL) Cold War-era research programme to develop an X-ray laser system as a ballistic missile defence (BMD) for the United States. The concept involved packing large numbers of expendable X-ray lasers around a nuclear device, which would orbit in space. During an attack, the device would… Read More


What was Zenith Star?

Introduction Zenith Star was a Directed-energy weapon that started development as part of the US Strategic Defence Initiative. Background Zenith Star included the Alpha laser, a high energy hydrogen fluoride chemical laser, and the LAMP mirror which was a 7 segment adaptive optics mirror. It was never put in orbit, but the Alpha LAMP Integration… Read More