A 1944 global aviation pact, and the principle of shared air safety, explains the foreign presence at the AI 171 crash site

Officials said they had found the cockpit voice recorder that may provide crucial clues about what caused the Air India flight to crash, killing at least 270 people.

The London-bound plane had barely left the runway at Ahmedabad airport on Thursday before it was careening back to earth. In a video, the aircraft was seen slowly sinking behind residential buildings,