As tensions rise between Europe and Russia, Russian aircraft have pierced NATO airspace in Poland, Romania, and Estonia in recent weeks. And in the Baltic Sea, another incident has raised the stakes even higher. A tanker named the Eagle S was tracked dragging its anchor across the seafloor, leaving severed cables in its wake.Undersea cables carry the lifeblood of modern existence. Electricity, gas, digital communications, global banking, the internet itself. Without the cables, all that would grind to a hal ...