The Air Force's fiscal year 2019 budget offers new details on its plan to recapitalize the Space-Based Infrared System and support future overhead persistent infrared requirements, even as the effort still lacks an approved acquisition strategy. The service expects to need $7.3 billion over the next five years for the Evolved SBIRS effort, meant to improve the capability of the satellite and ground architecture that provides key missile warning capabilities. The budget request calls for $643 million in FY-19 research...