Hannah Cox recently bought back the Dairy Den in Missouri Valley part of the legacy of her late father, Darrel Cates, who operated the summertime destination for 31 years.WATCH KATRINA'S STORY HERE Iowa woman buys back historic Dairy Den, honors late father's legacyThe ice cream shop has been a staple in the community since the 1950s. Cates, who also served as the police chief and a school bus driver, employed some of the same kids he drove to s…