A couple of weeks ago, word arrived that 120 new missile silos had been discovered in the desert of Northern China. While the press made much of this evidence that China is busy expanding its nuclear weapons program, they did not look at who found the silos and how he did it. As it happens, the silos were spotted by Decker Eveleth, an undergrad at Reed College. He spent weeks poking around on satellite imagery until he happened upon the silos’ distinctive inflatable dome coverings. (Which, in turn, has led some people to describe them as “bouncy houses of death.”)...