U.S. Rep. Nick Lampson (D-TX) introduced bipartisan legislation today to establish a series of goals to advance the nation’s human space flight program over the next twenty years. Among the goals specified in the bill, the eight-year goal would require the development and flight demonstration of a reusable space vehicle capable of carrying humans from low Earth orbit to libration points in space, which could be used to assemble large-scale scientific observatories far beyond low Earth orbit. The twenty-year goal would require development of a reusable vehicle to carry humans to and from Martian orbit, development of a human occupied research facility on one of the moons of Mars, and development of a reusable vehicle to carry astronauts from Martian orbit to Mars and back.