A map of the Delta created by the US Geological Survey in the 1910s.
California is always just one long drought away from a crisis. At the center of the state's complicated and aging water system is the Sacramento-San Joaquin Delta. Polls show many Californians aren't sure what or where the Delta is -- but the fate of cities, farmers and even fish depends on it. Efforts to relieve some of that pressure on the Delta often result in political deadlock. We look at the latest effort to break the Delta log jam. Reporter: Lauren Sommer