Pelley the africa mercy sails into ports to treat diseases that the rest of the world doesnt see anymore. You are our baby. Pelley for her mostly american crew. Hey, i hear your voice. Pelley . It is the journey of a lifetime. You know that there are some people saying to themselves, i could never do what she does. Those poor people are terribly disfigured. I cant look at them. People have been saying that to these people their whole lives. Someone has to look at them. Someone has to look them in the eye and tell them that youre human and i recognize that in you. Safer out on the lone prairie, a 200mile drive from the nearest airport, stands marfa, population 2,000. The train doesnt stop here anymore. At first glance, the place may look half dead. But look closer. Marfa today is an eccentric tex mex place of art galleries, tourists, cowboys and characters. Im steve kroft. Im leslie stahl. Im bob simon. Im morley safer. Im lara logan. Im scott pelley. Those stories tonight on 60 minutes