guests, posts on events of the day by me and friends of the show. you can find it where you've always found it, cnn.com/gps. this week's book is called "great soul." it's about joseph lelevelle the former editor of the "new york times," not a conventional biography. it tells the story of how a young lawyer, an indian lawyer went to south africa, politically inactive and was transformed into this great leader of a mass nonviolent resistance movement. how did gandhi become gandhi? fascinating story. now for the last look. let's take a look at the development of warfare. the u.s. civil war and all the wars throughout time that preceded it were fought on horseback and on foot. world war i was the first mechanized war with the introduction of tanks and planes and the war in afghanistan will probably go down in history as the first robotic war.