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Weapons stkaoeurpb at lawrence liver more national lab. its a great to have you tom and especially on a day when were looking at these different weapons. can you give us the definition between a dirty bomb and an atomic weapon? >> thank you jenna, good to be with you. the difference is basically a dirty bomb is a serious inconvenience, its packing a bunch of reactor rods or radioactive product around high explosives. it will make a mess and may kill a few hundred people. its a major nuisance, it...