"The simplest local tools are often much the most efficient means of assassination," counsels the study. "A hammer, axe, wrench, screw driver, fire poker, kitchen knife, lamp stand, or anything hard, heavy and handy will suffice." For an assassin using "edge weapons," the manual notes in cold clinical terms, "puncture wounds of the body cavity may not be reliable unless the heart is reached....Absolute reliability is obtained by severing the spinal cord in the cervical region." T he manual also notes that to provide plausible denial, "no assassination instructions should ever be written or recorded." Murder, the drafters state, "is not morally justifiable," and "persons who are morally squeamish should not attempt it."
One small part of Dwight Eisenhower's plan for Guatemala
http://www2.gwu.edu/~nsarchiv/NSAEBB/NSAEBB4/