Christopher Conover has a report on women's roller derby championships, and its growing popularity here in Tucson and around the country. | Robert Rappaport visits the Reid Park Zoo, and gets a chance to feed the giraffes. | Pam White reports on a device that's made right here in Tucson, the only FDA-approved artificial heart. | Peter Michaels interviews Bruce Phillips from the Tucson Peace Center about the upcoming 25th annual Peace Fair. | And, the "This I Believe" series continues, with a personal essay from teacher Theresa Arntz.
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