"Indeed," said the old man, "he did. As thoroughly as could be arranged, under the circumstances. The projectiles would be effectively atomized, as they entered. Of course they then encounter virtually solid blocks of extremely high-quality paper, edge-on. But our intent wasn’t to destroy that paper, but rather to make it difficult to handle safely. And also to tag it, if you will, for certain kinds of detection. Though there hasn’t been a remarkable lot of progress, in the past five years, with that sort of sensing. Another neglected area." He sipped black coffee.