South Korea's government has held an emergency meeting and vowed to swiftly respond to the arrests of hundreds of its citizens in a massive immigration raid at a Hyundai plant in the US. Seoul has dispatched diplomats to the site in Georgia, while LG Energy Solution, which operates the plant with Hyundai, said it was suspending most business trips to the US. US officials detained 475 people - mostly South Korean nationals - who they said were found to be illegally working at the battery facility, one of the largest foreign investment projects in the state. The White House defended...