Joseph Henry has returned as conductor of the Peoria Area Civic Chorale. This weekend, he leads them in their annual concert, "An American Family Christmas." He talks about the process of creating the right mix of material for each year's program, which this year includes a new setting of the text "O magnum mysterium" by composer Frank LaRocca. We also talk about the history of PACC's annual holiday concert. Performances are tonight, tomorrow night and Sunday afternoon at Five Points Washington.