Korean Air is seeking regulatory approval from the EU, US and Japan for its acquisition of cash-strapped rival Asiana Airlines. Korean Air CEO Walter Cho and other top executives have led negotiations with antitrust regulators, and met with foreign airline authorities to offer new flying slots in South Korea. It is working with the country’s transport and foreign ministries, and Korea Development Bank, the key creditor of Asiana Airlines. Of the three countries, Japan is expected to be the first to give the green light. The EU will announce a decision on Aug.3, while the US will make a decision after monitoring Japan and the EU’s stance.