NASA is blueprinting a matrix of steps for sending human explorers beyond low Earth orbit. The hush-hush planning is designed to give the next president of the United States options for shaping the space agency’s agenda beyond the International Space Station. Elements of what NASA insiders call the “Decadal Plan” scripts a buildup of space hardware at Earth-Moon and Earth-Sun libration points in the 2010 to 2012 time frame.