US president Barack Obama says he doesn't think marijuana is more dangerous than alcohol.
The president has acknowledged using pot when he was young and calls it "a bad idea." He says he's troubled that poor kids, many of them African American and Latinos, are far more likely to get locked up for smoking pot than middle-class kids.
But Mr Obama urges a cautious approach, saying people who think legalising pot will solve social problems are, quote, "probably overstating the case".
When it comes to harder drugs, he says, the harm to users and the social costs are profound.