we'll be right back. >> dickerson: we sat down with philanthropist and author david m. rubensteinis latest project, how to lead. it is a collection of conversations about the qualities it takes to be successful, which we might keep in mind when we're picking our next leader. david, you've been a leader, you've interviewed leaders. the country is in the middle of interviewing leaders right now for the presidency. if you were holding a job interview, knowing what you know about leadership, what would you look for in candidates? >> i'm looking for their ability to focus, their ability to communicate well, their ability to have some sense of priority of what is most important to them, their ability to inspire people, their ability to rise to the occasion. and i also think humility is important. anybody that is really a successful leader i think has failed in life. have you to persist after your failures. but failure gives you some humility. >> dickerson: how do you test for humility when you're interviewing somebody and all they're trying to tell you is how great they are? >> i often