The Space Force has formally launched a competition to prototype space-based interceptors, issuing a Sept. 18 request for proposals even as analysts and former senior defense officials warn that physics and budget realities cast long shadows over the Trump administration's centerpiece Golden Dome missile defense initiative. The solicitation invites industry bids for the Space-Based Interceptor (SBI) program under the auspices of Space Systems Command’s space combat power program executive office. The notice signals the Pentagon’s intent to award multiple fixed-price...