Blues icon B.B. King, widely considered one of the greatest guitarists of all time, died Thursday in Las Vegas. He was 89. King worked as a sharecropper in Mississippi as a boy, then rose to fame after teaching himself how to play the guitar. He made more than 40 studio albums, winning 15 Grammy awards and earning a spot in the Rock & Roll Hall of Fame. He toured relentlessly into his 80s, bringing the blues into the mainstream with his pain-filled voice, and the wailing of his Gibson guitar, nicknamed Lucille.