Contractor spill specialists prepare the barriers in Biscayne Bay in Miami, Thursday, Aug. 9, 2012. Grapefruit, oranges and limes were used as a stand-in for oil. The U.S. Coast Guard and other state and federal agencies want to see how well boom configured into a sort of arrow diverts the fruit out of swift currents in Biscayne Bay. (AP Photo/Alan Diaz)