The letter written by George S. Bozalis, M.D. on June 29, 1964, expresses appreciation for support of the continuation of sonic boom tests. Bozalis notes that opponents of the tests are a vocal minority and mentions that the Federal Aviation Agency will compensate for property damage resulting from the tests. The letter also mentions that friends and associates have not voiced opposition to the tests and emphasizes the importance of the data being collected for the growth and development of the Air Transportation System.