World Cafe celebrates Black History Month with a special on the birth of rap, in which rapper Kurtis Blow, DJ Grand Wizard Theodore, and museum curator Jim Fricke help host David Dye explore the birth of hip-hop. Kurtis Blow was the first rapper to sign with a major label, the first to earn a certified gold single, and the first to tour internationally. Grand Wizard Theodore was the DJ who invented scratching, utilizing turntables as an instrument to be played. Jim Fricke is the editor of Yes...