our report from our senior investigative correspondent lisa myers. >> reporter: bradley birkenfeld is an american banker who spent much of his life in switzerland, helping americans hide their riches in a swiss bank. in 2007 he went to the u.s. government and secretly provided information which ultimately led to swiss bank, ubs to pay a $780 million penalty, and turn over the names of 4,000 u.s. taxpayers with secret accounts in switzerland. today his lawyers announced the irs has rewarded birkenfeld with what's believed to be the largest whistle blower award ever. $104 million. citing his exceptional cooperation. >> with $5 billion collected so far, the award to brad is less than two cents on the dollar for every dollar collected by the treasury. >> reporter: after birkenfeld blew the whistle, he was prosecuted for failing to come completely clean about his own actions to help a client avoid taxes. he's now on home confinement, serving the end of a prison sentence. he and others argued the prosecution was unjust. >> this was the largest tax fraud case in the world, and i sacrificed m

. >> lisa myers in our washington newsroom, thank you. >>> now let's get a check of the weather fromy the makers of emergen-c. >> rain in las vegas in the last 24 hours, 1 to 3 inches of flooding and you are talking about flash flooding, homes flooded out, businesses, power outages, a real mess. good news is that is over, and they are finally getting a chance to do some cleanup. we are seeing some changes as far as our temperatures are concerned. got a big ridge of high pressure in the east. out west the jet stream dips to the south. got a trough of low pressure, and that's bringing cooler conditions to the plains. look at these temperatures. anywhere from 10 to 20 degrees below averages. as you get into the rockies and central plains, but ahead of the front and that jet stream you can see temperatures anywhere from 5 to 15 degrees above normal. in fact, you'll see temperatures in the 70s and 80s along the eastern seaboard. 90s texas into the central plains. 70s and 60s back into the pacific northwest. 90s in parts of southern california. that's what's going on aro >> good morning. a

in the vault this week, we found a report from nbc's lisa myers in 1991 chronicling the race-baitingdecades. >> they're always writing that the only reason governor wallace has any support is just because he says what people want to hear. >> reporter: in 1968, george wallace showed how powerful the mixture of race and working-class resentment could be. since then, every republican presidential candidate has run on some issue that raised racial overtones. richard nixon, law and order in the wake of the race riots. >> if we could only have enough law enforcement, we'll have no problem in the cities. that just keeps the lid on it. >> reporter: ronald reagan told the story of the welfare queen. >> in chicago they found a woman under 127 different names. >> reporter: george bush was accused of playing racial politics when he made a figure of this michigan convict. >> a man named willie horton who was furloughed and goes out and rapes and tortures before he was captured again. >> and now history will add the romney campaign to that list. this may be practical political strategy, fear of th