OnOn the afternoon of March 11th, 2011, Mitsuyoshi Hirai, the chief engineer of the cable maintenance ship Ocean Link, was sitting in his cabin 20 miles off Japan’s eastern coast, completing the paperwork that comes at the end of every repair. Two weeks earlier, something — you rarely knew what — damaged the 13,000-mile fiber optic cable connecting Kitaibaraki, Japan, and Point Arena, California. Alarms went off; calls were made; and the next day, Hirai was sailing out of the port in Yokohama t...