Air Force budget documents point to "chronic technical challenges" with Raytheon's TPS-81 radar design as the impetus for the service's decision to scrap the Three-Dimensional Long-Range Radar program's acquisition strategy for a new rapid prototyping approach. Inside Defense reported in January that the service would cancel its contract with Raytheon to develop a new radar to replace the legacy TPS-75 and planned to fund a new rapid prototyping effort to field a production-ready radar by fiscal year 2024. The...