Part 1. The rocket sleds and hot air balloons that propelled space technology after the dogs and chimps had done their work
Part 2. Project Mercury In 1958, the United States made its initial steps towards the goal of manned space flight. Seven men were selected to be the first American astronauts to test the limits of human endurance in space. We talk to some of the men and women (who were eventually dropped) who were selected and trained to be among the first to leave the boundaries of earth.