The threat to the undersea cables carrying internet data is growing more acute. A Russian unit called GUGI is surveilling them, CNN said. Russia is signaling it could take out the undersea cables ...

Have you ever wondered how an email sent from New York arrives in Sydney in mere seconds, or how you can video chat with someone on the other side of the globe with barely a hint of delay? Behind ...

LONDON—For around a decade, the Russian spy ship Yantar has crossed the globe and loitered over undersea cables in what ...