“The command post is a set of Manhattan publishing offices, and the foot soldiers include Joan Didion, Seymour Hersh, Bob Woodward, Anna Quindlen, Alex Kotlowitz, Paul Hendrickson, Samantha Power and Bill Walton. They are going on David Halberstam’s book tour for him. Five months after Mr. Halberstam’s death in a car accident on April 23, some of this celebrated journalist’s closest friends and colleagues will be banding together to cover different legs of a nationwide publicity tour for his final book.”