NBC March 1, 2019 9:55 am Politically Speaking: Pollution in the Tijuana River Valley, Part 2 NBC 7’s Alex Presha talks to Imperial Beach Mayor Serge Dedina about the ongoing pollution problem in this South Bay city. 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