[Times of Zambia] COPPER prices slipped on Wednesday from nearly five-month highs after weak United States data revived concern about global economic growth.?According to Reuters, three-month copper on the London Metal Exchange (LME) fell nine per cent to US$6,420 a tonne, paring more than one per cent gains from the previous session when it scaled its highest level since December 15, at $6,481 a tonne.