US Labour market: what's behind unexpected growth?

Employers added 336,000 jobs in September, almost double the 170,000 estimated, according to figures released by the Labor Department. Great news if you're looking for work there, of course, but if you're in the Federal Reserve, America's central bank, and worried about the economy overheating, maybe not so good. (Picture: Portrait of smiling waitress carrying food and drink on serving tray in bar. Picture credit: Getty Images)