A joint operation dubbed "No Laughing Matter" by the Food and Drug Administration's Office of Criminal Investigations and the Los Angeles County Sheriff's Department takes place in Los

 

              A joint operation dubbed "No Laughing Matter" by the Food and Drug Administration
A joint operation dubbed "No Laughing Matter" by the Food and Drug Administration's Office of Criminal Investigations and the Los Angeles County Sheriff's Department takes place in Los Angeles Friday, March 22, 2013. Authorities say the use of nitrous oxide as a recreational drug has grown from a rave phenomenon to mainstream use in recent years propelled by the ease of social media to advertise illegal parties, especially among teenagers. (AP Photo/Damian Dovarganes)