Powerball $478 million jackpot is nation's 8th largest

DES MOINES - Powerball players have a shot at the nation's eighth-largest lottery jackpot, but they should keep in mind that their dreams of riches likely won't become a reality.The odds of a winning ticket in Saturday night's drawing for a $478 million prize are incredibly small: one in 292.2 million.It's because of those odds that there hasn't been a winner since May 7, when a family from New Jersey won a $429.6 million jackpot. The nation's biggest prize was January's $1.6 billion Powerball j