Parabolic flights in which a plane breaks free of the earth's gravitational pull are used fortraining cosmonauts before they go into space. Emma Jane Kirby travels to Star City in Moscow with a group called Arts Catalyst, which is sending dancers, acrobats and film-makers to explore the creative potential of weightlessness. As she takes her first steps into zero gravity she discovers the intense emotions released through this extreme physical experience. ProducerSara Jane Hall (R)