A large disturbance in the sea can be observed off the coast of the Danish island of Bornholm September 27, 2022 following a series of unusual leaks on two natural gas pipelines running from Russia under the Baltic Sea to Germany have triggered concerns about possible sabotage. [AP Photo]
Deep underwater, the pipes and cables that carry the modern world's lifeblood - energy and information - are out of sight and largely out of mind. Until, that is, something goes catastrophically wrong.