According to published reports, U.S. officials, concerned that widely accessible technology is making it easier to forge money, said April 5 they planned to add new colors to the notes to foil counterfeiters.      “What we’ve seen now is the potential for increased counterfeiting by computers and scanners in people’s homes,” Thomas Ferguson, director of the U.S. Bureau of Engraving and Printing, told Reuters.      While Mr. Ferguson said scanned copies of dollars are usually poor quality s...