U.S. Farmers Using Robots to Milk Cows

Milking cows is a messy, menial and low-paid job that few US workers want to do.For years, dairy farmers - like much of America's agricultural sector - have therefore relied on immigrants. But visas are often only available for migrants doing seasonal work such as fruit picking. And a crackdown on undocumented workers, which has led to a record number of deportations, has made it even harder for farmers to find the staff they need. (BBC)