Boeing unveiled a conceptual model for a new hypersonic jet what might be a replacement for the SR-71 Blackbird reconnaissance aircraft. According to Aviation Week Aerospace Daily, the model was displayed at the American Institute of Aeronautics and Astronautics SciTech forum in Orlando. 

Boeing says the plane would be capable of speeds in excess of Mach 5. The company envisions a two-step process beginning with flight tests of an F-16-sized, single-engine proof-of-concept precursor vehicle leading to a twin-engine, full-scale operational vehicle with about the same dimensions as the 107-ft.-long SR-71.