Workers pick onions on a Vidalia onion farm in Lyons, Ga. Farmers are concerned that the state's new legislation meant to bar illegal immigrants from the workforce will scare away migrant laborers. David Goldman/AP hide caption

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Crowds gather at L.A. Street Food Fest last year, where food trucks competed for awards such as "Best in Show" and "People's Choice Award." Mark Krynsky/Flickr hide caption

itoggle caption Mark Krynsky/Flickr

From left: Brothers and Boyardee co-founders Paul, Hector and Mario Boiardi, pictured with company secretary Carl Columbi at Boyardee headquarters in Milton, Pa. Stewart, Tabori & Chang hide caption

itoggle caption Stewart, Tabori & Chang

"Can something be called chicken or pork if it was born in a flask and produced in a vat?" asks Michael Spector. "Questions like that have rarely been asked and have never been answered." iStockphoto.com hide caption

itoggle caption iStockphoto.com