Copper prices fell for a second straight session on Tuesday as the dollar surged, and the industrial metal's losses accelerated after Federal Reserve policy makers gave no hints of new stimulus measures to offset the effects of the worsening European debt crisis. In New York, the key March COMEX contract fell 2.25 cents or 0.65 percent to settle at $3.4415 per lb, after dealing between $3.4220 and $3.4945. Across other metals, aluminium was last at $2,001.50 a tonne from a close of $2,015 a tonne on Monday.