Once seen as a luxury of the corporate world, private planes are becoming increasingly common at U.S. colleges and universities as schools try to attract athletes, raise money and reward coaches with jet-set vacations. Iowa State University President Steven Leath, a pilot, acknowledged last year that he used a school plane for trips that mixed personal and university business, a practice that came to light after he damaged the aircraft in a hard landing. (Bloomington Normal Airport Authority via AP, File)