for the pbs nehour, this is economics correspondent paul solman reporting from in and around cambridge, massachusetts. >> woodruff: next, we turn to another episode of our weekly series, brief but spectacular. r,night, we hear from journalist, profesnd author walter isaacson. his biographies of influential figures range from leonardo da vinci to ada lovelace. isaacson believes that those who thrive at the intersection of onarts and sciences are th who will become a part of history. >> i had a mento sin new orleant of a family friend, great novelist, walker percy anhe said there were two types of people come out of louisiana, preachers and storytellers. he said, for heaven's sake, be a storyteller. the world has too many preachers. i like to take on subjects for my biography that stand in the intersection between the arts and the sciences, because whether it was benjamin franklin or steve jobs or leonardo da vinci, i think that's what gives creativity. steve jo, whenever he did a product launch which shows street signs, showing that intersection of the arts and sciences. that's what leo