mandate that it is a requirement. >> michael kaye, you know this, a former military pilot. you've heard in brian's piece also about these self-ejecting black boxes which are found in some military plane already. is that an option that they -- that should be considered for commercial jets, do you think? >> i don't think it -- it is an option clearly that can be considered. i actually think in all this conversation, we're going from what we've got now to the gold-plated option which is this live streaming through satcom. they're all interim technologies that have been rolled out three the fleet at the moment. one is the automatically survalent broadcast, adsb. the problem is, there's a single point of failure here. and jeff and david alluded to it earlier with the acars, it's actually the trans responder. the technologies at the moment rely on the transponder to either transmit or receive depending on adsb, what we've got now, or what we've got in the future. i think there's a relatively easy fix. and that relatively easy inexpensive fix is make sure you've got a transponder that can't be turned off.