Lady Bird flies to Williamstown, Massachusetts, where she receives key to city; lunch at Williams College President Sawyer's home; Vietnam war protestors along procession route; Lady Bird receives honorary degree; walk-out protest by graduating class; Lady Bird gives speech for Williams College's Center for Environmental Studies; Lady Bird & Professor James McGregor Burns go to Mt. Hope Farm; books about LBJ; to Clark Art Institute; dinner at President Sawyer's home