June 19, 2016 8:10 pm Olympic Swimming Champ Still Must Prove Himself After four years of waiting, hundreds of miles in the pool and a gold medal signifying he’s the reigning Olympic champion, Cal swimmer Nathan Adrian still must prove himself. Jessica Aguirre reports. US & World Videos 0:28 A Vermont state trooper plunges into icy pond to rescue 8-year-old girl 2:59 Keep these travel etiquette tips in mind this holiday season 2:20 Bodies of Missing Men Found in Rubber Bins Inside Storage Unit 1:42 Hundreds of Golden Retrievers Walk a Mile for the Official Boston Marathon Dog 1:51 Typewriter Shop Owner Receives Gift From Tom Hanks