While testifying in front of the U.S. House Subcommittee on Crime, Director of the National Institute on Drug Abuse Alan Leshner said in 1999, "There's no question that marijuana, today, is more potent than the marijuana in the 1960s.
Sida laga soo xigtay Agaasimaha Machadka Qaranka ee Xadgudubka Daroogada, Alan Leshner, "Su'aal kama taagna in marijuana, maanta, ay ka awood badan tahay marijuana sannadihii 1960.