Thomas L. Friedman's phenomenal number-one bestseller "The World Is Flat "has helped millions of readers to see the world in a new way. In his brilliant, essential new book, Friedman takes a fresh and provocative look at two of the biggest challenges we face today: America's surprising loss of focus and national purpose since 9/11; and the global environmental crisis, which is affecting everything from food to fuel to forests. In this groundbreaking...