joining me to talk about this, put it in context is the director of genetic counseling at emery university. thanks for joining us. most women do not have the defective gene. less than 1%. >> correct. less than 1% of women in the general population actually less than half a percent would carry a mutation in brca 1 or 2. >> only 5 to 10% of women diagnosed have the gene. >> at most. recent data suggests 3% to 5%. >> what is a woman to take from this? you hear the announcement from angelina jolie. you worry about breast cancer. who should be tested? >> the vast majority of women are not going to carry a mutation in brc 1 or 2. we look for clues in the family history. that would be multiple caseses of breast cancer in the family. earlier age of onset. ovarian cancer in the family as well. a woman who's had both breasts and ovarian cancer is a strong indicator. also male breast cancer. and oshkinazi jewish ancestry. one in four of that an sesry carry this gene. >> i shared earlier my own mother is a breast cancer survivor. >> mm-hmm. >> my mother. now i have three daughters. again, a lot of peo

. >> reporter: emery university professor pelham mcdaniels is writing a book on black jockeys.the late 1800's they were major stars. but when african-americans started earning big prize money, white jockeys literally drove them out. >> some jockeys would be whipped with the whip,when they were riding down the straightaway or the turn, and then in some cases the jockeys were jostled to the point where they fell off the horses and were killed. >> reporter: krigger respects those who came before and is glad to shed light on their legacy. but he hopes this weekend's race is not about race. michelle miller, cbs news, louisville. >> tonight on the showtime network, "60 minutes sports" will tell the story of the controversial trainer who will try to help kevin krigger make history, doug o'neill. >> and that's the "cbs evening news" for tonight. for all of us at cbs news all around the world, good night. sponsored captioned by media access group at wgbh access.wgbh.org >> your realtime captioner: linda marie macdonald >>> we need to look through their histories, their pedigrees, all th

alan abramowitz, political science professor at emery university. if you listen to most of the washington chatter this week, you would have thought that president obama was about to walk across the south lawn to a waiting helicopter never to return again. as peggy noonan put it we are in the midst of the worst washington scandal since watergate. so now with the week over, let's see exactly how much damage has been done to obama's approval rating. here you can see it. back on monday when the week of scandal began, the gallup daily tracking poll found 48% approved of president obama's performance and 45% disapproved. fast forward to yesterday after that long and bruising week of watergate coverage and we see that obama's approval rating has increased to 51% with -- now with only 42% disapproval rating. that's about as well as obama has done in any poll since his second term began. how do we make sense of this? one place to look at is our current partisan divide. among democrats president obama's approval rating stands at 84%. among republicans latest