Unsolved: Malaysia Airlines Flight 370
On March 8, 2014, Malaysia Airlines Flight 370 left Kuala Lumpur International Airport in Malaysia bound for Beijing. The last contact made from the aircraft occurred at 1:19 a.m. local time less than an hour into take off. The aircraft, its 227 passengers and 15 crew members were never heard from again.
After a two-year search and more than $150 million spent, the final ship still searching for any trace of MH370 set out looking for answers in December 2016, for what is likely to be the last time, NBC News reports. The vessel, the Fugro Equator, is due to complete its mission in early 2017.