President Obama recently called for the elimination of "tax breaks for private jet owners," painting anyone who doesn't cram themselves into 28 inches of economy legroom as a fat-cat wastrel. But owners of business aircraft swear to their utility. Private jets (which are powered by gas turbine engines, as opposed to pistons or props) utilize a network of more than 5,000 airports in the U.S, while commercial airlines only reach 550. The business aviation industry employs 1.2 million Americans and generates $150 billion in annual economic activity. Best of all: You don't have to take your shoes off at the airport.