By Scott DiSavino NEW YORK (Reuters) - Oil prices eased on Thursday, settling lower as traders remained worried about the U.S. economic outlook a day after the U.S. Federal Reserve cut interest rates for the first time this year. Brent crude futures fell 51 cents, or 0.8%, to settle at $67.44. U.S. West Texas Intermediate (WTI) crude fell 48 cents, or 0.8%, to settle at $63.57. The Fed cut its policy rate by a quarter of a percentage point on Wednesday and indicated it will steadily lower borrowing cost ...