christiane amanpour slips out to find the real havana. good evening. i m cynthia mcfadden. we begin with the lottery that seems to have everybody talking. the single biggest jackpot ever. and just about 48 hours from now, someone, somewhere, could be a half billion dollars richer. millions of people in 42 states have purchased what they hope to be winning tickets. we fake a hard look tonight at winners and losers. be the lucky one. reporter: they are buying in los angeles, on manhattan island, in philly, cleveland, in tulsa, oklahoma. some on a whim and some with a plan. all with the hope and the dream, and maybe deep down the need to win. $10. reporter: and whoever does win, it will be in a way that s never happened before. last night, when the balls popped out for the midweek drawing and known had the numbers for the jackpot, it changed the game sizewise. not only was the jackpot still out there, but it grew, hugely. it grew from this to this. wow that is a record