Dealers working in the Californian city told The San Francisco Chronicle, which spent 18 months researching the town, that they earned $350,000 a year, and that San Francisco's policies as a sanctuary city made it an appealing destination. That's because there's little risk of deportation if they're caught and convicted of drug dealing - with San Francisco also known among dealers for handing out light sentences if they do get caught dealing. El Pedernal used to be a sleepy agricultural town of 1,600 people: now, construction is a prime industry, with workers earning $35 a day - four times what...