Food and Drug Administration special agent Robert Maes looks for gas tanks labels during a joint operation dubbed "No Laughing Matter" by the FDA's Office of Criminal Investigations and

 

              Food and Drug Administration special agent Robert Maes looks for gas tanks labels during a joint operation dubbed "No Laughing Matter" by the FDA
Food and Drug Administration special agent Robert Maes looks for gas tanks labels during a joint operation dubbed "No Laughing Matter" by the FDA'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)