issue a standard that the life of the batteries should be extended and it gave a six-year implementation period. they are mandated by 2018. >> that's a long time. >> sure. but if you go into replacement, you put it in before that. so the answer is that these things seem to take a long time. anyone replacing batteries is putting in a longer life battery. >> well, the problem here is cost, right? these systems cost money. are the airlines going to accept that cost? >> it's not only a matter of cost, it's also if we are talking about a consensus agreement on what is the best way to know where an airplane is so it does not disappear. you also want to make sure that you don't wind up with 10 or 15 different solutions. it's already an issue that the industry deals with the global business and the ideal solution