TV tonight: why did Germanwings flight 9525 crash?

Experts piece together what happened in the 2015 disaster. Plus: Race Across the World contestants reach Shangri-La. Here’s what to watch tonight9pm, Sky Documentaries
It has been 10 years since the awful incident of the Germanwings Flight 9525 crash in the French Alps, in which all 150 passengers and crew were killed. The French public prosecutor’s office determined that the co-pilot, Andreas Lubitz, who had been treated for severe depression, deliberately crashed the plane. But thi