 With ABC now having a primary affiliate in the area and KBIM becoming the exclusive CBS affiliate for southeastern New Mexico (KSWS retained a secondary affiliation with CBS even after KAVE went on the air), KSWS-TV became an exclusive NBC affiliate.As KSWS became a sole NBC affiliate in the mid-to-late 1960s, economic problems were emerging in southeastern New Mexico.The potash mines near Carlsbad downscaled activity or closed, and the Walker Air Force Base at Roswell was deactivated in 1967.