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Malaysia Airlines's lost planes

Melvic Choo, 13, is presented with the ashes of his father, co-pilot Eugene Choo, whose body was recovered from the MH17 crash site in Ukraine. Malaysia Airlines flight MH17 was shot out of the sky by a BUK surface-to-air missile.

Engineers walk under the cockpit of a Malaysia Airlines plane.

Michelle Gomez mourns for her father with her mother, Jacquita Gonzalez. Patrick Francis Gomez was an in-flight supervisor on missing Malaysia Airlines flight MH370.

A relative prays as remains of victims of MH17 arrive in Malaysia.

Kelly, wife of a passenger missing aboard flight MH370, talks to the press about her husband. Relatives of the missing have complained about the Malaysian government's 'callous indifference' and lack of openness.

Wong Wai Kuan, who lost her husband Ng Qing Zheng onboard Malaysia Airlines flight MH17, cries during a memorial service to mark the first anniversary of the tragedy in Malaysia.

Two Malaysia Airlines planes experienced disaster in the same year. Flight MH370 disappeared from air traffic control radar and has still not been recovered. It was carrying 239 people. Flight MH17 was shot down by Russian-backed separatists in the Ukraine. All 298 passengers and crew were killed.