Warren Buffett and Charlie Munger explain the difference between the operating performance between railroad operators. The two reveal what they value most are two things you can't buy: time and love. They defend not being more transparent about stock holdings. The two also discuss what they know about flight safety in the wake of Boeing's 737 MAX jet problems. They explain Berkshire's philisophy on investing in tech stocks. They address concerns about activist investors. And they discuss competition in the insurance business.