LBJ and Lady Bird view film at State Department; Heart Disease, Cancer and Stroke bill signing where LBJ gives speech; LBJ walks dogs and greets tourists on White House grounds; Lady Bird works at desk; views entrances to D.C. for beautification; Congressional reception; photos in Blue Room; buffet in State Dining Room; Lady Bird accepts Churchill bust with remarks by Averell Harriman, LBJ, Lady Bird and Winston Churchill, the grandson; Lady Bird talks with Luci Johnson; dinner with LBJ's doctors