Acting President Choi Sang-mok on Sunday declared a weeklong national mourning period following the tragic Muan plane crash that claimed nearly 180 lives, marking South Korea’s worst domestic aviation disaster to date. “As of today, the government designates a seven-day national mourning period until midnight on Jan. 4,” Choi announced Sunday evening during a Central Disaster and Safety Countermeasures Headquarters meeting held in Seoul. The meeting marked the third of its kind addressing the fa