Lynda Johnson returns to Washington; Lady Bird to World's Fair heliport to meet LBJ; Lady Bird & LBJ to Singer Bowl where LBJ gives speech on poverty program; Lady Bird gives brief remarks; to Venezuela exhibit where they see President Betancourt; Federal pavilion & LBJ press conference; Lady Bird to Spanish pavilion & Goya exhibit; to JFK Educational Civic and Cultural Center on Long Island for LBJ speech; to Atlantic City for Jefferson-Jackson Day dinner & LBJ speech; reception at Shelbourne Hotel; D.C.