Here's what is known about the air crash so far: One of the strongest pieces of evidence that investigators are reviewing is a 59-second CCTV video clip that clearly shows the takeoff and the crash of the plane from Sardar Vallabhbhai Patel International Airport in Ahmedabad city, western Gujarat state.

AHMEDABAD, India (AP) — Indian investigators on Friday recovered the digital flight data recorder, or the black box, of the Air India flight that fell from the sky and killed 241 people on board and several people on the ground, authorities said.

India has had several major plane crashes in recent decades. In 1996, a Saudi Arabian airlines Boeing 747 taking off from Delhi collided in midair with an arriving Kazakhstan Airline flight, killing all 349 people on both planes.