FILE - Farm workers make their way across a field shrouded in fog as they hoe weeds from a burley tobacco crop near Warsaw, Ky., early in this Thursday, July 10, 2008 file photo. You may have to be at least 18 to buy cigarettes in the U.S., but children as young as 7 are working long hours in fields harvesting nicotine- and pesticide-laced tobacco leaves under sometimes hazardous and sweltering conditions, according to a report released Wednesday May 14, 2014 by Human Rights Watch. (AP Photo/Ed Reinke, File)