MRS. MCCARTHY TELLS LBJ SHE IS OVERCOME WITH EMOTION FOLLOWING LBJ'S SPEECH; LBJ THANKS HER, SAYS HE WILL WORK FOR PEACE; MRS. MCCARTHY REMINISCES WITH MRS. JOHNSON; MRS. JOHNSON REVIEWS LBJ'S DECISION, MENTIONS THEIR SONS-IN-LAW'S SERVICE IN VIETNAM