CHESTERFIELD, Mo. — A World War II veteran and his family stepped forward Monday to claim a Powerball jackpot worth more than a quarter-billion dollars, one of the largest single-ticket lottery prizes in U.S. history. Jim Wilson II, 84, and his wife, Shirley, 79, claimed the winning prize from last Wednesday's drawing, along with their three sons. "I was absolutely astonished," said Jim Wilson, a retired electrician who served in the Army's 82nd Airborne Division in Africa and Europe, at an afternoon news conference. "I couldn't believe it, and still don't." He bought the winning ticket — with the numbers...