(CNN)– Tuesday, March 25, NASA outlined a plan to build a permanent base on the moon. The agency says the goal is to strengthen U.S. leadership in space by establishing a sustained human presence. The plan includes more frequent missions initially targeting landings every six months. It w ill roll out in phases starting with robotic missions then building infrastructure and later enabling long-term stays on the moon. The first crewed moon missions since the 1970s are set to begin next year. Categories: News Tags: NASA ...read more read less