World: We may never know why the Air France plane went down
- The flight data recorders may be lost at sea forever. Noting that the crash happened in the middle of the ocean, investigators say it may be impossible to find. While the recorders give off a signal that lasts up to 30 days, they can’t find the signal because it’s floating underwater. France has sent a submersible to help find the signal. The depth of the Atlantic near where the wreckage was found is nearly 21,000 feet. source