Powerball jackpot nears $1 billion mark at estimated $950 million after no one won grand prize of roughly $850 million

The Powerball jackpot is approaching the $1 billion mark for Saturday night's drawing. It's at an estimated $950 million after no tickets came up winners for Wednesday night's jackpot of roughly $850 million — the game's sixth-largest ever at the tim... [1614 chars]