"the ‘nmediate future, Air Force‘interest|ssems to die in the veryy heavy weapons, In 5-7 years more emphasis on the intermediate and lighter weights is anticipated, Dr. . Bradbury suggested that the following weights, in pounds, might characterize the weight classes of interest in the next a-7 years: 40, 000, 20,000, 10,000, less than 10, 00