Every imaginable shade of blue manifests in the lagoon of Bora Bora, aka, the Jewel of the South Seas. Coral motus ring the main island like a sandy sash, and beneath the surface, dolphins, rays, sharks, turtles and colorful fish throng. Presiding over it all is the moss-green volcanic peak of Mount Otemanu, where god descended to the island on a rainbow, according to local lore. Timeless grass-skirted dancers and exotic overwater bungalows round out the sublime scene.
Many countries have national airlines that the government owns and operates. Fully private airlines are subject to a great deal of government regulation for economic, political, and safety concerns. For instance, governments often intervene to halt airline labor actions to protect the free flow of people, communications, and goods between different regions without compromising safety.
Since airline reservation requests are often made by city-pair (such as "show me flights from Chicago to Düsseldorf"), an airline that can codeshare with another airline for a variety of routes might be able to be listed as indeed offering a Chicago–Düsseldorf flight. The passenger is advised however, that airline no. 1 operates the flight from say Chicago to Amsterdam, and airline no. 2 operates the continuing flight (on a different airplane, sometimes from another terminal) to Düsseldorf. Thus the primary rationale for code sharing is to expand one's service offerings in city-pair terms to increase sales.