ANTIQUES ROADSHOW wraps up its trip to Tucson, Arizona, as host Mark Walberg and appraiser Colleene Fesko tour the Tucson Museum of Art, rounding up works of art depicting horses. At the Tucson Convention Center, crowds brave the 104-degree heat to bring in some cool objects, including a rare collection of 1956 Olympics memorabilia saved by the owner's father, trainer for the gold medal-winning American basketball team that included Bill Russell; a striking collection of World War II American propaganda posters; and a trio of paintings by acclaimed 20th-century French "outsider" artist Gaston Chaissac, given an auction estimate of $50,000-$100,000.