Eleven years ago today, Jason "Jam Master Jay" Mizell, the pioneering Run-D.M.C. member, was shot and killed in a Queens recording studio by an unknown assailant. At the time of his death, Mizell had already long cemented his legacy in hip hop, influencing virtually every DJ that came after him in scratching, look, attitude and performance. Super-producer and Jam Master Jay protégé Pete Rock shared his 5 Favorite Run-D.M.C. Songs, but if you need a quick history lesson on Jay's, and the group's, greatness, check out our Essential Run-D.M.C. Playlist below.