Food is different from airplanes. On a middle class salary, I could afford to take a flight from Atlanta to Liberia and back for $300. Or $250 to get to Vegas a

Food is different from airplanes. On a middle class salary, I could afford to take a flight from Atlanta to Liberia and back for $300. Or $250 to get to Vegas and back. Spirit recently went out of business, but in 100 years I bet supersonic jet travel will be available to the middle class.