Andrei headed for it, and as they drew nearer, Laura saw little white spires scratching the skyline above the dike—tall street lights. Bicyclists rolled along the roadbed like gnats on wheels. And the office building looked more and more peculiar as they drew near—each story smaller than the last, stacked on a slant, with long metal stairs on the outside. And on its roof, a lot of tech busywork—satellite dishes, a radar mast.