Video above: West Coast winemakers fear smoke damage to grapesThe sight is every winemaker’s nightmare.”Smoke-tainted” grapes, blackened casks of wine, charred and broken bottles where once there were picturesque vineyards.In California’s celebrated Napa Valley, instead of welcoming visitors to their wineries for the autumn harvest season, winemakers this year are looking at decimated vineyards. Massive wind-driven wildfires have damaged and destroyed dozens of the region’s