gpm a ei ae and directions at various altitudes as well as the intensity and location of fallout have steadily improved since the first Nevada tests in 1951. There has been concern and speculation in some quarters lest the Nevada atomic tests should affect weather conditions, Representatives of the Weather Bureau and advisers of the Atomic Energy Commission are here and prepared to discuss this phase of the subject. Therefore in this introductory state- ment I shall limit myself to saying that the Commission has worked in close cooperation with the Weather Bureau and there are no existing data which suggest that our weapons testing program has influenced weather conditions in any way. The American people can be assured that the extreme safeguards which govern these tests are desigred to prevent injury to the people of any community or city from fallout. The Commission has an extensive network of monitoring stations in areas near the test site and throughout the United States and is able to measure the levels of radioactivity with sensitive methods, Daily advices are received from more than 100 of these radiation detection installations operated by the Commission, the Weather Bureau, and the Public Health Service,