“No joke: Circus scholar Janet Davis counts some 85 circus schools and training centers scattered across the country, where everyone from bona fide big-top and art-house pros to curious civilians and energetic youngsters learn the ropes, high wires and German wheels of circus yore. … And roving troupes and single-ring spectacles abound.” Journalist Holly Millea visits the very last performance of Ringling Bros. and Barnum & Bailey Circus Xtreme as well as several of the new-style circus spectaculars (a group in which, interestingly, she has included Elizabeth Streb’s dance company). Millea even tries out a trapeze class.