Try your luck -- Mega Millions jackpot hits $868 million in US

Your chances of winning are slim to none, but it might be worth investing a few dollars in the Mega Millions contest in the United States before Friday's drawing.It would be the largest jackpot in global lottery history if claimed by a single winner.The previous largest single jackpot of $758.7 million was won last year by Mavis Wanczyk, a 53-year-old mother of two from Massachusetts.