July 29, 2014 10:32 am Mr. Wu Turns 2 at the San Diego Zoo Watch this video of the San Diego Zoo’s youngest giant panda cub Xiao Liwu celebrating a significant milestone on Tuesday, July 29, 2014. 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