In this April 19, 2014 file photo, partygoers dance and smoke pot on the first of two days at the annual 4/20 marijuana festival in Denver.
In this April 19, 2014 file photo, partygoers dance and smoke pot on the first of two days at the annual 4/20 marijuana festival in Denver. Brennan Linsley AP
In this April 19, 2014 file photo, partygoers dance and smoke pot on the first of two days at the annual 4/20 marijuana festival in Denver. Brennan Linsley AP