airforce

It can transform from helicopter to airplane in seconds, providing a vital role for the US military by ferrying troops in and out of combat zones.

But the V-22 Osprey has also caused the deaths of 62 service members. A crash in Japan last year grounded the entire fleet.

The US ground its entire fleet of V-22 Osprey helicopters after eight US airmen died on a training flight when the aircraft malfunctioned.