NEW ORLEANS - The federal judge in Louisiana who is presiding over litigation stemming from the explosion of the Deepwater Horizon and ensuing oil spill in the Gulf of Mexico on Sept. 6 awarded summary judgment to the defendants in suits brought by three Mexican states after finding that they were unable to show that they had a proprietary interest in the waters affected by the spill (In re: Oil Spill by the Oil Rig "Deepwater Horizon" in the Gulf of Mexico, on April 20, 2010, MDL 2197, Case Nos. 10-4239, 10-4240, 10-4241, E.D. La.; 2013 U.S. Dist. LEXIS 127393).