Most people think that the chance of survival in an airline accident is slim. For that reason, safety is the number one priority in civil aviation industry. Airline makers are always improving their designs to make air travel safer. Now, air travel is considered to be the safest form of travel surpassing land and sea transportation. While international aviation organizations continues to improve the safety standards of airlines, accident still happens. And the Philippines had a fair share in the list of those. Here are some of the worst.