Schools in Thailand conducted active shooter drills on Wednesday, as authorities moved to strengthen security measures two weeks after a 14-year-old opened fire at a school and killed at least eight people. At the Surasamontree School in Bangkok, students took part in a “run, hide, fight” exercise, with a police officer dressed in black and acting as a mock attacker, armed with a handgun and an assault rifle firing blanks. Students ran from the gunman and hid under tables and behind locked...