A Facebook-backed subsea communications cable is set to become the world’s longest – directly connecting three continents — Africa, Europe, and Asia. On Tuesday, the major tech firm announced that the 2Africa cable would now extend more than 45,000 kilometers (27,960 miles) once it’s completed. The 8,000-kilometer extension will see 2Africa become the most extended subsea cable system in the world upon completion, Facebook said. This means it will also beat the current record set by the SEA-ME-WE 3 line that stretches 39,000 km and connects 33 countries across South East Asia,