dr. saltz's battle against the cost of cancer drugs started in 2012 when the f.d.a. altrap for treating advanced colon cancer. saltz compared the clinical trial results of zaltrap to those of another drug already on the market, avastin. he says both target the same patient population, work essentially in the same way and, when given as part of chemotherapy, deliver the identical result, extending median survival by 1.4 months, or 42 days. >> saltz: they looked to be about the same. to me, it looked like a coke and pepsi sort of thing. >> stahl: then saltz, as head of the hospital's pharmacy committee, discovered how much it would cost-- roughly $11,000 per month, more than twice that of avastin. so $5,000 versus $11,000, that's quite a jump. did it have fewer side effects? was it less toxic? >> saltz: no. >> stahl: did it have something that would have explained the... this double price? >> saltz: if anything, it looked like there might be a little more toxicity in the zaltrap study. >> stahl: he contacted dr. peter bach, sloan-kettering's in-house expert on cancer dr

dr. saltz, let me go to you on that.nt to get your take on how the duggars describe what happened and your take on this. listen to how they describe it. >> for us of course this is public shame, that our son did this, back 12 13 years ago. this was not rape or anything like that. this was like touching somebody over their clothes. there were a couple of incidents where he touched somebody under their clothes. but it was like a few seconds. >> it was more of his heart, his intent. he knew that he -- it was wrong. but they weren't even aware. it was like, you know -- it wasn't to them they probably didn't even understand that it was improper touch. >> what josh did was inexcusable, but it was not unforgivable. >> your reaction to how they dealt with this? >> yeah i think it's an understandable compartmentalization and somewhat a denial of the seriousness of it. i'd have to agree. and what concerns -- >> is that common with -- >> very common. i mean you love all your children. and so it's very understandable that you don't

it's the same question dr. saltz, i asked about dr. hastert.hastert followed sexual improprietor tepriety on his fellow colleagues. maybe he would say, i shouldn't be the speaker of the house. >> we're always curious about this. why do people come out and do this public thing that is so far in the opposite direction. become the pillar of morality when there is some real skeleton in their closet? i think it's psychically motivated. it's called splitting. it's basically the mind's way of saying to itself, imnot guilty of this. i do not have this urge to do something sexually wrong. in fact, i'm the opposite. i'm so the opposite that i will be the moral pillar for the world and show everyone and show myself that i'm that good. and it's something that psychologically goes on. you talk about mark foley, hag ert, you say, why were they actually the representative of the best of the best when this was going on? that is what the mind does to try to squelch urge. when the better thing to do is to understand that urge so that you don't need to continue t