At 6:10 on a March afternoon in Montgomery, Alabama, Ginnie Lackland sat on the steps of Miss Lily’s acrobatics studio, watching her classmates get picked up by their mothers. Ginnie was a big girl, almost seven, who could do front splits and a perfect backbend and was learning to flip herself completely around without touching the floor—what flying must feel like, she imagined. Miss Lily told her to think of a perfect circle.