to get to the larger point, one of my mentors was david halberstam, and he wednesday talked about going to the toy department to write be a sports book, i completely disagree with that. his sports books were more illuminating than some of his other work, and i think that sports offers the opportunity to write about several -- along with the drama, which is similar to politics, winners and losers and there's a contest, and there's certain drama to that. but sports is one of the key ways to write about some of the major sociological issues of the united states, including especially race. and i've always been interested in that. >> host: vince lombardi. you moved to green bay for a winter. roberto clemente, moved to puerto rico. >> guest: spent a lot of time there. >> host: barack obama, you traveled to africa. indonesia, hawai'i. why is it important to get into the physical space? >> guest: that's the first law how i do this. good there, wherever it is. only by immersing yourself in the geography and the culture of a place that you can start to understand the forces that shape somewhere,