March 18, 2015 10:25 pm Fentanyl Reappearing in Heroin San Diego-area DEA agents say they are seeing the reappearance of fentanyl on the streets, a dangerous substance that is 30 to 50 times stronger than heroin. NBC 7’s Candice Nguyen reports on March 18, 2015. 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
