As darkness descends over the flatlands of West Texas every Friday from September through December, a dazzling, disorienting glow, visible on the stark horizon for miles around, ignites the blackened sky. Looming over the landscape, Ratliff Stadium, the country's biggest high school football field, overflows with 20,000 spectators, their voices raised in the trademark chant: "MO-JO! MO-JO! MO-JO!". more