Perched among the tall buildings in downtown San Francisco, my office can feel like a nest in a tall tree. Yesterday evening, the birds that live atop the Transbay terminal swirled up to, and around, the windows of our conference room, and the aerie-like feeling was stronger than ever. One bird even landed, briefly, on the ledge of the window. I have no idea what kind of birds they are, what brought them to us, or what they hope to achieve. But I am in awe of them.