Colorado residents turned out in droves to the world’s first state-licensed sale of cannabis to anyone over 21 years of age, despite long lines and cold weather across the state. A total of 136 stores were authorized to make the sales with the majority of them being in Denver. State officials expect to generate $67 million per year in tax revenue from the sale of legal cannabis which will be spent on public projects like schools in part.

The Department of Justice warned Colorado regulators that drugs better remain within the state, prompting warning signs at the Denver International Airport. If problems arise, the DOJ threatened that a crackdown could happen, putting the brakes on the legalization movement.

Read more about the move to legalize cannabis in Colorado at the BBC: