Pathways to Exploration: Rationales and Approaches for a U.S. Program of Human Space Exploration - Mary Lynne Dittmar

50 years after we first began, Americans continue to fly into space not so much because the public strongly wants it to be so, but because space exploration dominated by the vehicles and astronauts of other nations seems unthinkable. Yet human spaceflight among the longest of long-term endeavors—can not be successful if held hostage to short-term decisionmaking and budgetary processes. The "Pathways to Exploration” report, requested by Congress and commissioned by NASA through the National Research Council, describes findings, principles, and goals that may be helpful to revive human spaceflight and create a sustainable program of human exploration of the endless frontier of space.