. >> bpa is of concern, bececause it looks s like an estrogen. anand it's bbeen sn to have a weak estrtrogenic effect. anand so if you're expod to a chehemical that migight terfere wwith your hormone levels, in this case your estrogen, that can have effects, particularly i if it happens during development. >> and there is preliminary data that says that it may in fact directly--an early life exposure might directly incncrease the risk of breast cancer in animals. >>> if there are chemicals that affect the development of the brereast even before birth, ifif there are chemicalss that cause breast tumors in animals, these are chemicals that we want to be worried about and start thinking about reducing exposure. >> in addition to breast cancer, bpa may be associaiated with gegenetic damage and a wide variety of f reproductive, metabolic, behavavioral, and developmental proroblems. it's one of the top industrial chemicals in the world. about 6 billion pounds of bpa are produced globally each year, earning manufacturers a profit of some $8 billion. >>

still need to be worked out, including a maintenance and operation agreement for the stations that bpat that bart will operate. >>> the warriors want to clinch the no. 1 spot in the west. and they're getting close. next in sport, scott will have highlights from tonight's games. tonight's games. >> this is seriously cool. a dream come true for a teacher from turlock. it happened when michael buble came down from the stage and asked her to perform with her. they sang together and he even signed the poster. he poster. ♪ ♪ ♪ new wok fired shrimp, another american chinese creation from panda express. and because redfin.com is america's #1 brokerage site our agents get more eyes on your home so you sell for thousands more than the one next door. don't get stuck in the past. sell with a redfin agent. >>> scott's back with sports. warriors, cavaliers. cav leers made it close. made it close. >> they did. a little more exciting than a lot thought. warriors had a chance to clinch the top seed in the west tonight. a nuggets loss to portland would do the trick. green opens up the scoring with two t

again, he's being held he had a high bpa, a good grade point average, an but again, according to authorities, he had that manifesto that came out just shortly before the shooting. and now they're investigating all of this in connection to it. >> steve patter san outside in southern california for us. >> coming up, president trump says the nra is, quote, under siege. now an investigation launched by new york state's attorney general into the nra's tax exempt status. what is be in we're going to bring it to you live. you are watching msnbc. ve you are watching msnbc >>> the nation's most powerful gun lobbying organization, the nra, has faced a long list of adversaries but now it's facing off against its own members. the nra is in what's called a war from within. the group quietly announced at its conference, its current president, oliver north, will not seek a second term after reports of infighting with wayne lapierre. he reported he was being exto extorted and pressure id and now an trns president trump is weighing in on the fight tweeting the nra under siege by cuomo and the new york state

. >> i think the preferred way to make everyone gay is bpa, that's according to alex jones, the plastic and the water bottles and their turning everyone gay which he seems to think is about and i don't see why. sorry, i got sidetracked. >> that can be fun. [laughter] but the idea is to, we are assigning all of these motivations to sometimes events that happen. >> so, social psychologist will tell you that the reason we believe in conspiracy theories is for psychological reasons and historians will tell you it is for historical reasons. and they are both right. one reason we believe in conspiracy theories is that our brains are naturally programmed to make patterns, to see patterns. and to think the big events have big causes which is part of the reason why the jfk assassination has always just made people crazy. the idea that one person could change the course of history. that one person could kill the president, it does make sense to us. and so yeah, our sort of everything in us was to create a narrative even when there isn't one. >> you are right and but we have also confirmation bias