BBC Producer Andrew Miller-Jones introduces this second exchange program produced in Baltimore and sent to Great Britain. Johns Hopkins University's Applied Physics Lab, sponsored by the Navy's Bureau of Ordinance, is featured. Dr. Gibson discusses cosmic rays and instruments used to do research on the effects of high altitude flying. Mr. Riblet explains how telemetering works and shows instruments used to transmit information from a distance. Mr. Miller-Jones exhibits cameras developed by Clyde T. Holiday to take photos in outer space and some of the pictures and films taken by these cameras. A chart shows the current maximum altitude of flight (nearly 80,000 feet) and the effects of altitude on pilots. A pilot tests the U. S. Air Force-developed pressure suit, and pictures show the U.S. Navy full-pressure suit.

Explorations of the upper atmosphere are made through telemetering or the measuring of remote objects from afar. Rockets take these measuring devices into the upper atmosphere to measure cosmic ray intensity, fuel consumption, oil pressure, air speed, altitude, and the magnitude of the earth's magnetic field. Receivers on earth will retrieve the measurements transmitted from space through a radio link. Current uses of this information aid in the development of guided missiles.