edgar hoover titled: "martin luther king, jr. security matter - communist."ver requests authority for "technical surveillance" of king. the approval is signed by attorney general robert kennedy. and there was no court order. it was the signature of the f.b.i. director and the signature of the attorney general? >> comey: yep. and then, open-ended-- no time limit, no space restriction, no review, no oversight. >> pelley: and given the threats in the world today, wouldn't that make your job so much easier? >> comey: in a sense, but in... also in a sense, we would give up so much that makes sure that we're rooted in the rule of law that i'd never want to make that trade. >> pelley: some of the worst of the f.b.i.'s history is in its investigation of dr. king. so, on comey's orders, f.b.i. academy instructors now bring new agents here to talk about values lost in the pursuit of the man who became a monument. >> character, courage, collaboration, competence. we have to be able to call on those tools in our toolbox to be able to make sure that we are correcting some