Boeing has officially unveiled "Son of Blackbird," and it could be the SR-71's successor. This Mach 5 hypersonic future high-speed strike and reconnaissance aircraft boasts a TBCC propulsion system, which combines conventional turbine engines with dual-mode ramjets/scramjets (DMRJ). The company is planning a two-step development process for the new war plane. The first would involve flight tests of an "F16-sized, single-engine" precursor vehicle that acts as a "proof of concept," while the second, a "twin-engine, full-scale operational vehicle" that with similar dimensions to the 107-foot-long SR-71. Click here for the first image in today's viral picture gallery. Continue reading for the five most popular viral videos today, including one of the Star Wars Cantina Theme played by a Rubik's Cube while it's being solved.