More than 300 South Korean workers arrived at Incheon International Airport on Friday after being released from a U.S. immigration detention center in Georgia. They were among about 475 people detained in a September 4 raid at a Hyundai battery plant site, where footage of the shackled workers sparked public outrage in South Korea. Seoul said it had reached an agreement with Washington for the workers' release, with the incident raising concerns over future South Korean investment in the U.S.