K.C. Hwang, whose six-decade-long journalism career included 30 years chronicling South Korea’s tumultuous modern history for the Associated Press, latterly as Seoul bureau chief, has died. He was 99. His son says Hwang died Thursday of chronic ailments. From joining the AP in 1957, Hwang witnessed and reported on some of South Korea’s most dramatic and turbulent moments in its postwar history. He ranked the 1960 uprising, in which massive student protests over the government’s election fraud and corruption allegations triggered bloody police crackdowns, as “the most shocking, dramatic...