For several decades it has been widely accepted that human space exploration is the exclusive domain of government agencies. The cost of performing such mission

Seeking to reenergize Americans' passion for the space program, the value of further exploration of the Moon, and the importance of human beings on the final fr

More than four decades have passed since a human first set foot on the Moon. Great strides have been made in our understanding of what is required to support an

Extending the spatial and temporal boundaries of human space flight is an important goal for the nation and for the National Aeronautics and Space Administratio