The global internet is powered by vast undersea cables. But they're vulnerable — James Griffiths
Hong Kong (CNN) On July 29, 1858, two steam-powered battleships met in the middle of the Atlantic Ocean. There, they connected two ends of a 4,000 kilometer (2,500 mile) long, 1.5 centimeter (0.6 inch) wide cable , linking for the first time the European and North Amer