guest: i think there will be kind of a replay of the philip zimmermann discussion in 1993. what do you do with contraband information? when information violates some law, like export control, can you violate free-speech to control it? i don't think you can. i think in the end this gun will proliferate. it seems to me the only way to actually try to regulate a gun like this is to move the regulation to the ammunition, which still cannot be printed for now. author ofew connee andy greenbg the book "the machine kills secrets." andy greenberg has been our guest. thanks for your time. if you are and ap government student you are probably in the midst of repairing for your ap government exam. this is your chance. we haven't opportunity to help you out. our annual cram for the exam segment. some tips, guidance, maybe go through a couple of questions to do that. if you're interested in a question, here you go. what if the questions you might see. state and local governments are required to to do something without funding. what is it called? think about that for a little while. we w