Pat Slack, commander of the Snohomish Regional Drug Task Force, is here with Alison Holcomb, the director of a campaign to legalize marijuana.

"I don’t know if we are making a dent," says Slack, referring to law enforcement's work to make pot arrests in Washington State. Still, Slack thinks marijuana should remain illegal and wants voters to reject Initiative 502. He explains why: "Our job is to keep a lid on the garbage can and chase it around the parking lot." What's that strange analogy mean? Arresting people for marijuana users, he says, "is one of the keys" to public safety.