A 6-year-old South Dakota girl who was initially accused of cheating in a federally-sponsored art contest was restored as a winner, and her painting of a duck is again on track to be used on a U.S. postage stamp. A 9-by-12-inch oil painting of a canvasback duck by Madison Grimm, of Burbank, S.D., was declared the winner from some 29,000 entries in the 2013 Federal Junior Duck Stamp Contest. In addition to having their artwork immortalized on a stamp, winners receive a $5,000 scholarship. But days after the April 19 announcement, U.S. Fish & Wildlife Service officials said Madison —...