MAYPORT, Fla. - Coast Guard Sector Jacksonville marine pollution responders and Coast Guard Cutter Valiant crewmembers prepare oil-containment boom to deploy around a commercial vessel at the Safe Harbor Marina, Wednesday, Aug. 15, 2012. The boom is used to contain an oil spill and to prevent the oil from spreading. (U.S. Coast Guard photo by Petty Officer 3rd Class Jessica Potter)