In late 2017, Susan Crawford was visiting Seoul, South Korea, about six months before it hosted the 2018 Winter Olympics. Although she's an expert in telecommunications policy, Crawford was stunned at what she witnessed in Korea, which she describes as "the most wired nation on the planet" - flawless cellphone coverage even in rural areas, real-time data transmission, driverless buses using the latest communications technology to smoothly avoid pedestrians and evade obstructions. "I've never been embarrassed to be American before," Crawford told me recently. "But when Korean people tell you that going to America is like taking a rural vacation, it really makes you stop and worry about what we're up to." Crawford, who teaches at Harvard Law School, has assembled her concerns, along with suggestions how to alleviate them, in a new book published this week entitled "Fiber: The Coming Tech Revolution - and Why America Might Miss It....