A Korean Air Boeing 737 Max 8 experienced a sudden emergency shortly after taking off from Incheon International Airport, plummeting 26,900 feet before making multiple erratic loops before stabilizing. The plane, which departed from Incheon International Airport at 4:45 p.m. local time on Saturday, suffered issues with its pressurization system while flying over South Korea’s southern resort island of Jeju. According to data from Flight Radar, the plane began descending sharply, dropping nearly five miles in 15 minutes. Commercial jet airliners typically cruise at altitudes ranging from 30,000 to 40,000 feet. So, assuming the aircraft was flying at the upper...