March 8, 2013 9:14 am San Francisco Guardian Angels Helping to Prevent Crime In the wake of recent violence, the San Francisco Guardian Angels is working to prevent more crime. Stephanie Chuang reports. 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