Shuttle Scan.

Presents news briefs concerning space travel. View that the U.S. government should review the environmental impact of the space business before it considers any new space ventures; Progress of work on the Aeroassist Flight Experiment, which will be deployed in 1994 from a Space Shuttle; Retirement from the National Aeronautics & Space Administration of astronaut Michael McCulley, who will work as the space operations vice president of Lockheed; Development of a joint exchange program between U.S. and Soviet life scientists to carry out biological and medical experiments on the ground, on board Soviet Cosmos satellites, and in the Mir space station.