sentences:  Zinc's population was 188 in 1930 and declined thereafter.The last store closed in Zinc in the late 1960s and the post office closed in 1975.Zinc, in the 21st century, became the headquarters of a chapter of the Knights of the Ku Klux Klan (KKK), classified as a hate group by the Anti-Defamation League and the Southern Poverty Law Center The "Christian Revival Center" near Zinc belongs to a preacher who is also the leader of the Knights of the KKK.