Main Concept: Astronauts get special training to function in the weightlessness of space. Preview: Astronaut Sally Ride explains to Robin the function of the remote manipulator arm and the use of a special helium balloon to simulate a satellite in space. As the first female American in space, she also describes how it felt to live in a weighless condition. SPACE CAMP, DAY FOUR: Paco goes on a simulated shuttle mission. BIOGRAPHY: Black astronaut Charles F. Bolden Jr.