The following is an adapted excerpt from Alexander Zaitchik's book, Common Nonsense: Glenn Beck and the Triumph of Ignorance, due out this month on Wiley & Sons.

Every July 4, Glenn Beck emcees the Stadium of Fire celebration in Provo, Utah. The patriotic extravaganza is the most elaborate Independence Day celebration in the country, drawing more than fifty thousand people annually to Brigham Young University’s LaVell Edwards Stadium for a program of family music, star-spangled speeches, military displays, and a magnificent array of fireworks. Sponsored by the conservative Mormon group Freedom Festival, the Stadium of Fire is the closest thing in the country to an institutionalized Rally for America, Beck’s controversial 2003 traveling pro-war roadshow. It is not surprising, then, that this is among the high points of Beck’s calendar year. “There’s nothing like Utah on the Fourth of July,” he likes to say.

The Jonas Brothers were the biggest commercial act on the 2009 Stadium of Fire program, but the chaste Disney boy band didn’t headline. That honor went to an enormous American flag, 155 feet by 90 feet, which was ritually burned during the show’s climax. It was Beck’s job as emcee to narrate the rite as it was carried out according to an elaborate official protocol. When a cauldronlike container at the center of the field was set afire, an emotional Beck declared, “If our American flag could speak, oh, the stories she would tell.”

With those words, the Stadium of Fire became a Coliseum of Crying. “Many people teared up,” reported the Deseret News, “including event emcee Glenn Beck, who emphasized to the audience what a special ceremony they were witnessing.”

Except that it wasn’t. A few days later, Provo’s fire chief admitted that the nylon flag had not, in fact, been burned, as the crowd was led to believe. Because of safety concerns, a less volatile material had been quietly substituted for the flag in the giant cauldron. Like the emcee’s famous tears, Provo’s patriotic inferno was not what it seemed.