Welcome to North Cove, Washington, a small coastal town battling the most extreme erosion on the West Coast. For more than a century, this area has been losing an average of 100 feet of beach per year. House after house toppled into the ocean until just a few years ago, when the community mounted a stunning comeback.  What started as a grassroots, last-ditch effort to save "Washaway Beach"  could be a model for coastal erosion control around the world.