later, learn about arlington cemetery's tomb of the unknown soldier. find more at c-span.org/history or consult your program guide. now, here's lectures in history. >> ladies and gentlemen, you're in for another special treat today, another world class presenter, walter hood. walter is the distinguished professor of landscape architecture at the university of california, berkeley. he was formerly the chair of that department. among the many distinctions and awards that walter has received, he is the prize macarthur fellowship genius award, that's hard to get it all in, that he received in 2019. walter has been acclaimed for design work for the united states and abroad. for us here in charleston, walter was selected to design exhibits for the festival over the years. i also had the great pleasure of working with walter through the institute on city design. in the 21 1/2 years of working on the international african american museum, he came to discover the history and location. the founding director of the national museum of african american history is w