July 28, 2017 11:35 am RoboSub Competition in San Diego NBC 7 Liberty Zabala reports from a competition in which hundreds of students from all over the world are competiting with underwater robots. 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