SEOUL - Korean-Canadian singer Mark, formerly of K-pop boy band NCT, apologised after photos surfaced online showing him wearing a shirt featuring the Confederate flag, a symbol associated with white supremacy in the United States.The 26-year-old’s newly established agency Upper Room released a statement on social media late on June 23, apologising to fans who may have felt hurt or disappointed by the incident.“We would like to extend our sincere apologies for the concern, discomfort and disappointment caused by the vintage T-shirt that appeared in a recently shared photograph,” the agency said in a statement written in English.The controversy emerged...