Pedestrians walk past a recently built trio of geodesic domes that are part of the Seattle headquarters for Amazon, Sept. 7, 2017. The online retail giant said it was searching for a second headquarters in North America in 2017, a huge new development that would cost as much as $5 billion to build and run, and house as many as 50,000 employees. (Stuart Isett/The New York Times) Photo: STUART ISETT, NYT