Musician recalls final gig with his late bandmate, who died weeks after Black Sabbath’s farewell show in Birmingham

"I didn’t realize then that I would never see Ozzy again after that night," Butler writes of the July 5 "Back to the Beginning" show in England.

Black Sabbath bassist Geezer Butler has penned an emotional essay about the band's reunion gig in Birmingham, England, on July 5, which was the last time he saw his friend Ozzy Osbourne