LAKE MICHIGAN - The U.S. Environmental Protection Agency research vessel Lake Guardian transits through Lake Michigan near Chicago with a U.S. Coast Guard Vessel of Opportunity Skimming System attached to the ship May 9, 2012. The VOSS is intended for oil spill response and can be used on various types of vessels. (U.S. Coast Guard photo by Petty Officer 1st Class Lauren Jorgensen)
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