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It’s official: Cars in the U.S. are more efficient than they’ve ever been, and most of the credit goes to obscure improvements in gas-fueled vehicles.
Dec. 18 (Bloomberg) -- ODB and Tupac are coming back to life and going on tour - in the form of holograms. The shiny illusions are not only driving album and concert ticket sales, but videos of them are also going viral on YouTube. Bloomberg's Cory Johnson checks out how they're made.