Investigators sifting through the wreckage of the China Eastern Airlines Corp. jetliner that slammed into a hillside two days ago will glean the most conclusive evidence on what caused the crash from the two flight recorders, one of which has already been retrieved from the mangled parts. Analyzing the boxes is key to discovering why the Boeing Co. 737-800NG jet plunged out of the sky at close to the speed of sound before slamming into a hillside. The pilots didn’t respond to calls from air-traffic controllers after the plane tipped into its nosedive, authorities said. The officials are considering all possibilities that the crash could have been caused from an equipment malfunction, to a weather-related event, to pilot illness or suicide or even a terrorist attack of some description. Watch the full video for more.
