cambridge analytica is apologizing. alexander cogan built a personality test app that allowed him to access facebook user data. in an interview with 60 minutes, he said he's just one of tens of thousands of developers who did the very same thing. >> the idea that we stole the data i think is technically incorrect. they created these great tools for developers to collect the data, and they made it very easy. this is not a hack. this was, here's the door, it's open, we're giving away the groceries, please collect them. >> facebook denied having any knowledge of kogan's decision to sell users' data. denies having any knowledge of cogan's decision to sell the data. >>> the e. coli outbreak. ahead, the warning signs that even some of the doctors can miss. >>> and here's an invitation for you to sub scribe to cbs's podcast. find them all on itunes and apple's ipod apps. that covers everything, right?