Agents with the Food and Drug Administration's Office of Criminal Investigations search for nitrous oxide tanks during a joint operation dubbed "No Laughing Matter" with the Los Angeles County ... more 
Agents with the Food and Drug Administration's Office of Criminal Investigations search for nitrous oxide tanks during a joint operation dubbed "No Laughing Matter" with the Los Angeles County Sheriff's Department 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) less 
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Associated Press | Photo By Damian Dovarganes
Fri, Mar 22, 2013 9:18 PM EDT