By The Chosun DailyPublished 2018.05.15. 08:060Children and their teacher take a selfie in an elementary school in Daejeon on Monday, ahead of Teachers' Day.Editor’s PickNorth Korea unveils new air-to-air missile in first live-fire test 1h ago|Yang Seung-shik, Yang Ji-ho, Lee Jung-sooWashington courts HD Hyundai as it moves to oust Chinese cranes from US ports 20h ago|Park Soon-chan, Han Yena, Park Su-hyeonSouth Korea's self-employed sector contracts for fourth month 20h ago|Kim Min-jeong, Park Su-hyeon