September 18, 2019 11:30 am Former President Obama Speaking at Event in SF Former President Barack Obama visited San Francisco to speak at a tech company event. Bob Redell reports for NBC Bay Area on Wednesday, September 18, 2019. 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