Sister Aimee: At the peak of her immense popularity in the 1920s, evangelist Aimee Semple McPherson was drawing larger crowds to her revivals than those of P.T. Barnum or Harry Houdini. This chapter of "American Experience" paints a vivid portrait of the controversial and charismatic religious figure. Credited with mainstreaming religion in American culture, Sister Aimee created one of the country's first Christian radio stations, among other accomplishments.