Alaska has become the third state in the US to legalise the recreational use of marijuana.
A ballot measure approved by Alaskan voters in November takes effect today, allowing adults of 21 and over to possess up to an ounce (28g) of pot and up to six plants. Regulations for the sale of the drug are still to be hammered out.
Smoking marijuana in public remains off-limits, and police officers in Alaska's largest city plan to strictly enforce the public ban.
Fear of people being fined for smoking in public led an organiser to call off plans for a celebration party in central Anchorage.
Marijuana legalisation supporters in Anchorage want the event to be low-key. They also plan to launch an advertising campaign recommending safe consumption, including ads on city buses.