Quote Systematically Shut Down News Today

If one stops working, you go to the second one. so to have a redundant system and both of them not operating, that means it was done by some human being. >> john, you also think if this new information pans out that human intervention is involved here. >> certainly the sequence of events leads one to believe that there was somebody sequentially turning things off in that airplane. i mean, theres just no other conclusion. i agree with several of the previous witnesses saying that. >> john is ther...

Off. >> and you say you can know that definitively why? >> well, because you have two transponders. if one stops working, you go to the second one. so to have a redundant system and both of them not operating, that means it was done by some human being. >> john, you also think if this new information pans out that human intervention is involved here. >> certainly the sequence of events leads one to believe that there was somebody sequentially turning things off in that airplane. i mean, theres j...

Thats because according to investigators, everything is on the table. in fact, officials now believe the plane might have been sending out electronic signals or pings four to five hours after its radar beacons stops transmitting. tonight weve just learned that u.s. officials believe the radar beacon or transponder was shut down separately from the system that continued sending out the empty pings 14 minutes apart. that could be extremely significant. american investigators telling abc news that ...