9. Malaysia Flight 370

Even with all the modern advances in technology, experts are stymied by the disappearance of Malaysia Flight 370. The flight took off from Kuala Lumpur International Airport in Malaysia on March 8, 2014. The flight veered off course and disappeared from radar as it approached Vietnam.

infoplease.com

Despite exhaustive search efforts led by several countries, the crash site has yet to be found. A piece of debris was found some months later, but the full crash site was never discovered.

Many are blaming the pilot who allegedly planned to crash the flight. Others say that pilot became unconscious and the plane flew on autopilot until it crashed in the Indian Ocean.

dailymail.co.uk