lenses. experience life well lit. ask which transitions adaptive lens is best for you. [ male announcer ] engine light on? come to meineke now for a free codean read and you'll say...my money. my choice. my meineke. >>> welcome back to "cnn sunday morning." i'm alison kosik. bottom of the hour now. number one, just hours from now north korea's most important holiday of the year, april 15th, the country's founder kim il-sung. many wonder if he'll use his grandfather's birthday to make good on the rhetoric. number two, detainees at one guantanamo bay detention camp have been isolated and in individual cells. they used weapons to go after the guards but no one suffered serious injuries. number three, venezuelans head to the polls today to pick a leader less than six weeks after president hugo chavez's death. chavez ruled venezuela for almost 14 years and won re-election last october. more than 18 million venezuelans are registered to vote. number four, louisiana's meat packing company a recall due to possible listeria contamination. the recall includes 460,000 pounds of meat sent to retail delis. >>> a third republican senator is publicly anno

lenses. what is it 69 in the summer of 2008 to host code as the company still exist? >> guest: it was sold and parts of it have been some portions of it still exist. >> host: how old were you when you went to medical school? >> guest: 32. >> host: what occurred to you to go to medical school at 32? >> guest: i really kind of had it down when the business was sold i was working for other people that build a pretty good size business and profitable and so that the interest of our people who didn't have an interest in the business but one of the profits only rather than a product and the price and the service. and you practiced for 25 years are you still? >> guest: this is the first year i've not practice. >> host: are you retired officially or chose not to practice? >> guest: i couldn't afford to continue to pay the malpractice insurance and as a senator can to build or offset the contest. >> host: as a senator deutsch are not allowed to earn an income as a doctor. do you plan on going back? >> guest: it depends how far back by emi continuing to medical education. >> ho

such that it will cancel out the yellow and give you the complementary color, so you see your coded lenses, the nice purplish color. ain't that neat? you like? yeah. yeah. i bet-- gang, we'll talk about polarization. we talked about charged polarization before. we talked about, like, negative, being on one side of a molecule, positive, on another. polarization, in this sense, is altogether different. we're talking about the lineup of waves. if i take a rope and tie it to the wall, and i shake the rope up and down like this, guess which way the wave will vibrate. how many say, "oh, probably like this"? hey, come on, come on. trick question. no, no. if i shake it up and down like that, the rope will vibrate like that. and the vibration is aligned. we don't say aligned. we say it's polarized. if i shake the rope back and forth horizontally, then i'll generate a horizontally polarized wave. okay? you saw the example in the textbook. if i pass these waves through a picket fence, maybe the picket fence can filter them out. it turns out, if i have a picket fence where the fence stakes are all ver