." >> montgomery: the letter, from the new us attorney, melinda haag, drew a hard line at oakland's industrial growing warehouses, threatening criminal prosecution of city officials if necessary. the city decided to put the pot production plan on hold. not long after, the we grow pot superstore in oakland, which had opened with such fanfare just six months earlier, closed its doors. the politics of pot are, for now, at a stalemate. but the state's marijuana marketplace, legal and illegal, is still thriving. >> you can see that large patch that's vacant here. that was all weed. >> montgomery: a few hours south of oakland, among these vegetable fields in the state's central valley, drug agents say pot production is now booming right in plain sight. >> they're drying some in that white truck right there and they're processing stuff, but that's pretty much all that's left. >> montgomery: bill ruzzamenti was a special agent with the dea for 30 years, and now runs a federally-funded drug task force in california to seek out and seize illegal marijuana and eradicate the grows. >> can you open it up?