LBJ returned to White House last night after Veterans of Foreign Wars speech in Detroit; Lady Bird worked all day Monday on filming of family quarters; Lady Bird works on scripts for more filming; filming in Lady Bird's bedroom; Luci Nugent is visiting; Luci is writing book about Yuki; LBJ teases Luci about her briefcase; filming in Treaty Room; tea for Connie Freeman; visit with the Bill Whites; Dean Rusk testifies before committee of Democratic National Convention; Vietnam; USSR invades Czechoslovakia