Planners in NASA’s Exploration Directorate recently gave United Press International an exclusive briefing on the steps they envision to fulfill President Bush’s new vision for space exploration. These steps include designing the vehicle to fly back to the moon as well as the new fleet of atomic-powered spacecraft that may open up astronaut visits to deeper in space. In Part 1, NASA explains the different approach it is researching to achieve the first human visits to the moon since Apollo 17 in December 1972. When American astronauts make their return, some of their missions will resemble the old Apollo voyages and some will be far more advanced.