TBILISI, Georgia — John Wurdeman uncorks a bottle of Pheasant's Tears, holds it to the sun, and drinks with a smile. Vintners describe the longhaired American artist, with his imaginatively named wine, as an unlikely savior of their industry in the Black Sea country of Georgia. He started the business after a Russian trade embargo, which threatened the existence of 35 existing wineries. Georgia makes some 90 million liters a year and previously exported 80 percent to Russia. "There is an 8,000-year wine-making tradition, and there are 520 wine grapes here," Wurdeman says. "We have the best wine story on the face of this planet."