Federal Reserve Chairman Ben Bernanke said on Thursday the U.S. economy has been resilient in the face of credit market strains but it faces risks on both the growth and inflation fronts. Mary Altaffer / AP Federal Reserve Chairman Ben Bernanke. "Financial market volatility and strains have persisted," Bernanke said in testimony prepared for delivery to the congressional Joint Economic Committee. "In addition, further sharp increases in crude oil prices have put renewed upward pressure on inflation and may impose further restraint on economic activity." Bernanke said that when Fed policy-makers met on Oct. 30-31, they saw both downside risks...