In retrospect, the reason for the assassination is hardly a mystery. It is now abundantly clear ... why the C. I. A.'s covert operations element wanted John Kennedy out of the Oval Office and Lyndon Johnson in it. The new President elevated by rifle fire to control of our foreign policy had been one of the most enthusiastic American cold warriors.... Johnson had originally risen to power on the crest of the fulminating anti-communist crusade which marked American politics after World War II. Shortly after the end of that war, he declaimed that atomic power had become 'ours to use, either to Christianize the world or pulverize it' -- a Christian benediction if ever there was one. Johnson's demonstrated enthusiasm for American military intervention abroad ... earned him the sobriquet 'the senator from the Pentagon....