Ratings powerhouse Antiques Roadshow has announced its 2010 tour cities and dates. “We’re calling this our Crystal Anniversary Tour,” Roadshow e.p. Marsha Bemko said in a statement. “It’s our way of celebrating Roadshow’s 15-year romance with America’s stories, its objects, and its extraordinary history.” Bemko is also author of the new book, Antiques Roadshow Behind the Scenes. Here’s the schedule: San Diego, June 12; Billings, Mont., June 26; Miami Beach, Fla., July 10; Biloxi, Miss., July 24; Des Moines, Aug. 7; and Washington, D.C., Aug.21.