It took less than a week for the Trump administration to kill the considerable buzz created Jan. 1 when California’s broad marijuana legalization law took effect, creating the largest legal U.S. cannabis marketplace.

Then-U.S. Attorney General Jeff Sessions rescinded a policy shielding state-licensed medical marijuana operators from federal drug prosecutions.

The move sent a chill through the nascent legal industry. But ultimately it had little impact because federal prosecutors around the country showed little interest in going after legal operators.

Sessions, a staunch marijuana opponent, later lost his job and the cannabis industry thrived in a hugely significant year for the legal pot movement , in the United States and beyond.

Here are some highlights:

— Jan. 1: California’s law takes effect, allowing people 21 and older to use marijuana.

— Jan. 4: Sessions rescinds policy.

— Jan. 22: Vermont’s Legislature legalizes recreational marijuana. It’s the first time a state legislature, rather than voters, approved such a law.

— June 25: U.S. health regulators approve the first prescription drug made from marijuana. The medication, Epidiolex, is used to treat two rare forms of epilepsy in young children.

— June 28: Oklahoma becomes the 30th state to legalize medical marijuana use. [Read More @ AP News]