Teens talk about what life is like in Ringling Bros. and Barnum & Bailey Circus. Fifteen-year-old Gery Kehaiova can do something few other teen-agers can: She can twirl 45 hoops around her neck, waist, arms and legs, all at the same time. She does this almost every day, sometimes three times a day, as a performer in the Ringling Bros. and Barnum & Bailey Circus. This year's edition of the circ