The Air Force plans to cancel a contract with Raytheon to develop the Three-Dimensional Expeditionary Long-Range Radar due to "numerous technical and supplier challenges." "The Air Force is changing its acquisition strategy for the Three-Dimensional Expeditionary Long-Range Radar (3DELRR) program and will take actions to conclude its current engineering and manufacturing development contract with Raytheon," Air Force spokeswoman Patty Welsh told Inside Defense today. The service originally chose Raytheon as the 3DELRR prime contractor in 2014, but Lockheed Martin...