documentary on the vietnam war is filled with stories of soldiers on all sides of the conflict. but the most tragic aspect was to hear linden johnson on tape before full u.s. engagement, admitting that the war could not be won. president johnson s statements are in may 1964, when the united states had fewer than 20,000 troops in vietnam, serving only as advisers and trainers. this is what president johnson said to his national security adviser, george bun did. bundy. i stayed alast night thinking about this and the more i think about this, i m afraid we re getting into another cakorea. i don t think it s worth