Lady Bird says goodbye to LBJ, Luci and Lynda Johnson; Lady Bird travels to Offutt AFB, Omaha and Lincoln, NE; Lady Bird gives speeches and plants tree; Lady Bird receives painting by Nebraska artist; Lady Bird goes to Boys Town; Lady Bird and Governor to Lincoln for Governor's Conference on Natural Beauty; nap; Nebraska Lands Parade; weather delays travel to LBJ Ranch; accident with Him, the beagle; Lady Bird visits with Charlton Heston about Vietnam