stewart baker. stewart baker: yeah, very briefly. i think that example shows that there are times when we simply will not leave the decision to the companies. it's -- and if you believe that, if you thought there was a phone that had data about the importation of a nuclear device into the united states, no one would be saying, oh, well, it's apple choice about whether they're going to use their backdoor to provide access. we would say this is a choice that ought to be made by society as a whole through our elected representatives. i -- and if you believe that, then i think the answer to the question is, yes, there are times when companies should be required to help law enforcement. john yoo: also, we would help american companies would willingly try to help in such a situation, shouldn't need the compulsion of the law. what worries us, i think, is this growing atmosphere that it's okay for tech companies to say no, we're not going to help the government even in a scale of a threat as high as the one you're proposing, mr. chief justic