NBC June 5, 2019 7:12 am Researchers Study Del Mar Bluff Collapses Recent rainfall and water runoff are part of the reason why the Del Mar bluffs are collapsing. NBC 7’s Audra Stafford has more. 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