Robert Kennedy is shot in Los Angeles; LBJ discusses gun control with Senator Mike Mansfield; LBJ calls Senators Dirksen & Aiken about agriculture; Lady Bird cancels appointments; Lady Bird works on telegrams for Rose & Ethel Kennedy; LBJ makes plane available for Kennedy family; Lady Bird has coffee with houseguests; phone call from Luci Nugent; Lady Bird talks with Lynda Robb; LBJ has meetings & telephone calls; Lady Bird thinks of dangers to her family; LBJ gives television speech