@CNN: A flight from Hong Kong to the Chinese mainland suddenly lost air pressure and dropped nearly 20,000 feet because the pilots were smoking in the cockpit and accidentally pushed the wrong buttons https://t.co/nxJdUGdBqc https://t.co/3PolCnogz4

@CNN: A flight from Hong Kong to the Chinese mainland suddenly lost air pressure and dropped nearly 20,000 feet because the pilots were smoking in the cockpit and accidentally pushed the wrong buttons https://t.co/nxJdUGdBqc https://t.co/3PolCnogz4