A cockpit recording of dialogue between the two pilots of the Air India flight that crashed last month indicates the captain turned off the switches that controlled fuel flowing to the plane's engines,

Advocates for cockpit video cameras say footage could fill gaps left by the audio and data recorders, while opponents say concerns about privacy and misuse outweigh benefits.

Investigators are probing the wreckage and cockpit recorders to understand what went wrong just after take-off. The Air India flight climbed to 625 feet in clear weather before losing location data about 50 seconds in, according to the FlightRadar24 website.