April 30, 2018 12:15 pm Classes Canceled Due to Gas Odor in National City As NBC 7 Melissa Adan reports, two elementary schools were evacuated Monday morning as a precaution after some people in the area reported a strong odor of gas fumes. 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