: an interview with charles koch. it took joel silverman years to become a master dog trainer. but only a few commands to master depositing checks at chase atms. technology designed for you. so you can easily master the way you bank. >> announcer: it's "sunday morning" on cbs and here again is charles osgood. >> charles: charles koch is a billionaire many times over, and much discussed in the world of business and political funding. this morning he's making a rare appearance answering questions to anthony mason. >> when charles koch took over the family business nearly a half century ago, he had a vision for the oil company that his father founded. >> it worked out okay. how much can we grow over a period of time and projected that out through my life, and a few years ago, we were 70 times that amount. >> koch industries, headquartered in a sprawling glass and granite campus in wichita, is now the second largest private company in the country, with more than a hundred thousand employees worldwide, the conglomerate ref