dr. shanna swan, an epidemiologist at the university of rochester medical school. dr. compared the levels of phthalates in a group of pregnant women with the health of the baby boys they gave birth to. did you find that the higher the level of phthalates in the mother's urine during pregnancy, the greater the problems in the young boys? >> yes. >> what did you find in the babies? >> we found that the baby boys were, in several subtle ways, less completely masculine. >> dr. howard snyder, a pediatric urologist at children's hospital in philadelphia, says swan's findings line up with what he's seeing in newborn baby boys-- an alarming increase in deformed sex organs. >> lie him down, and let me just examine him. >> dr. snyder operated on one-year-old griffin to correct something called hypospadias, a birth defect that causes problems in urination. but he's good now, right? >> he's a healthy little guy, who's, i think, going to get through the rest of life just aiming without any difficulty at all. >> that's great. >> we hear that there are more and more and more cases of

swan." that is the next time. we will see you then. >> there is a saying that dr.at said there is always the right time to do the right thing. i try to live my life every day by doing the right thing. we know that we are only halfway to completely eliminating hunger and we have work to do. walmart committed $2 billion to fighting hunger in the u.s. as we work together, we can stamp hunger out. >> and by contributions to your pbs station from viewers like you. thank you. >> be more. pbs. captioning sponsored by macneil/lehrer productions >> ifill: house republican leaders offered their own proposal today to avert the prospect of a year-end tax hike. good evening. i'm gwen ifill. >> brown: and i'm jeffrey brown. on the newshour tonight, we get perspective on the partisan tug- of-war in washington, from one half of the team that produced

some experts are now referring to the shooting as a black swan event, an event so rare and devastating it cannot be anticipated. drdrew harper from the university of texas, finding somebody like lanza before they act is like finding a needle in a haystack. >> it's impossible to predict who is going to be the one that carries this out. >> gregg: joining us with more, henry cloud, author of "necessary endings." this is metaphor but there is great reference on the internet and journals of all kinds. do you buy this? >> well, i think you've got to make a big distinction between prevention and prediction. here is the logic of it all. reality is that people that do these things are mentally ill or they have social isolation, inability to connect. strained connections. some sort of dark side, but only a small fraction of mentally ill people or socially disconnected people end up doing something violent like this. so there is the problem. you can't predict who is going to do it. what we can do, this is what we need to focus on, what we can do we can prevent things from getting to this when we all have an eye on people tha

including as we talked about moments ago, what would make swan want to kill in thisomeone want to kill in this way in the first place. we had drhis satellite feed went down. we will get him back up. i really do want you to hear from him. it's so hard to find people who are truly experts in this kind of thing, in school security and he's one of them. we got him? let's bring back dr. shaw. welcome back. in terms of recognizing the signs, you know what i mean, most people are regular folks, they see somebody, he's weird, he's odd, he's shy, he keeps to himself. this guy they said he dressed more formally, he held a briefcase in high school. he would push up again the lockers when friends went by, he didn't like to talk to anybody. how do you discern that from shy necessary, awkwardness, asburgers which can be a social impediment for some folks from a would be murderer. >> i would advise everybody not to start labeling, not use terms like asburgers or autism. i think that is incorrect, it's wrong, it's offensive, it's like labeling someone who is too short or too tall or left-handed, that kind of thing. i think in the immediate ne