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Rep. John Garamendi and U.S. Senators, from left, Harry Reid, Dean Heller and Dianne Feinstein laugh at a joke during the 18th annual Lake Tahoe Summit at the Valhalla Estate in South Lake Tahoe, Ca., on Tuesday, Aug. 19, 2014. The event, which attracts government officials, scientists and educational and environmental agencies from California and Nevada, helps focus on environmental issues key to the preservation of the Lake Tahoe basin. (Las Vegas Review-Journal/Cathleen Allison)