RINGLING BROS. AND BARNUM & BAILEY CIRCUS

The so-called Greatest Show on Earth returns with a spectacle based on the theme of dragons. Wire walkers, animals, gymnasts, aerialists and, of course, clowns will be among those providing the thrills and laughter. Details: Through Monday, July 2. US Airways Center, Second and Jefferson streets, Phoenix. $15-$90. 602-379-7800, ticketmaster.com.