Fast food is a staple of American culture, but some of its workers struggle to survive

By CLAIRE SAVAGE, Associated PressFRESNO, Texas (AP) — The only moment TiAnna Yeldell has to herself is when she’s sleeping, and that doesn’t happen much.The 44-year-old single mom of three works 80-hour weeks to provide for her children, ages 8, 14, and 18. During the day, she is a driver for Pizza Hut, where she…