Honey bee with "saddlebags" of pollen attached to thier hind legs return to the U.S. Department of Agriculture People's Garden apiary, atop the headquarters' Whitten Building in Washington, D.C., on Wednsday, May 22, 2013. The bees gather pollen from plants within about two miles to bring back to the hive for food. The activity of gathering from many flowers before returning moves pollen from plant to plant. Bees provide one of the several types pollination methods. USDA Photo by Lance Cheung.