> Space Americans watched their country's first moonwalk from small, fuzzy black-and-white television sets. For the generations that followed, it might come as a surprise that, even with all of the modern advancements in technology, the United States lost its lunar-landing capability half a century ago. NASA actually hasn't had a rocket powerful enough to send astronauts deep into space since it retired the last Saturn V in 1973. But as of Nov.16, NASA is back in the moon business. When the Space Launch System, NASA's new 322-foot megarocket, tore through the sky with the inaugural test flight of the…