NASA readies to test history’s largest, most powerful booster for its new rocket

NASA’s massive heavy-lift rocket, the Space Launch System, which will one day ferry humans to deep-space destinations and back, has become┬ánotorious for the scale of engineering backing it. In September 2014, agency administrator Charles Bolden had unveiled the world’s largest welder to mark the start of the SLS’s construction. Next, on March 11, NASA will …