but joe ligon says he's not dwelling on the ligon for those 68 years and that's without any medical costsk you for that story. you're watching "cbs this morning." we'll be right back. i'm morgrgan, and ththere's me to me ththan hiv. more love,e,... momore adventuture,... more c community.. but wiwith my hiv v treatment,. therere's not momore medicins in m my pill. i talked t to my doctotor... anand switcheded to... fewer medidicines withth dova. prprescriptionon dovato is foror some adulults who arare startingng hiv-v-1 treatmenent or r replacing t their curret hiv-v-1 regimen.n. with... jujust 2 medicicines.. in 1 pilill,... dovato is s as effectitive as a a 3-drug reregimen... to help yoyou reach and stayay undetectatable. reresearch shohows people e whe hiv treaeatment as p prescribe. and d get to and stayay undetectatable... can no lononger transmsmit hihiv through h sex. don't t take dovatato if youou're allergrgic toto any of itits ingredieien. oror if you tatake dofetilil. hepatititis b can n become harr toto treat whihile taking g do. do not stotop dovato w without talking toto yo

jeffrey: glenn ligon is himself a well-known artist.e museum exterior represents the words of a young man beaten while in police custody. but for this exhibition he had another role, helping to finish the work of the man who conceived and inspired it. >> it is one of the most can sick -- significant south african artists of the century. jeffrey: nigerian-born okwui enwezor was a hugely influential art world figure, first as a champion of contemporary african art and artists, little known or seen in museums. i spoke with him for his seminal 2002 exhibition, the short century. >> coming to the united states a little more than 20 years ago, i was really confronted with the complete absence of what i consider to be a history that i belonged to. jeffrey: over the years, enwezor would help expand that space, before dying of cancer in 2019 at age 55. >> grief and grievance was his last project, turning his attention to the african-american experience. glenn ligon points to the range of work to show the subtle yet powerful approaches of artists