FILE - In this July 25, 2012, file photo, California Gov. Jerry Brown waits for the start of a news conference to announce plans to build a giant twin tunnel system to move water from the Sacramento-San Joaquin River Delta to farmland and cities, at a news conference in Sacramento, Calif. Environmental and fishing groups have filed challenges Thursday, June 29, 2017, seeking to block Brown's ambitious plan to build a pair of massive water tunnels in California. (AP Photo/Rich Pedroncelli, File)
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