History is made everyday. Thankfully, Bill Adler has been around long enough to preserve most of it. As the first publicist for Def Jam Records, Bill's been collecting hip-hop photographs and memorabilia for the over 30 years. Recently, he sold a majority of his collection to the Smithsonian's newly minted National Museum of African American History and Culture. Here, Bill speaks on his pioneering tenure, collection, Lyor Cohen, Russell Simmons, LL Cool J, Public Enemy, and more