447, to make the assumption they were pinging at all. and so overlook an area. go over and scan someplace thinking well we're not looking for anything but a ping. but what they should be looking for also as they're looking for that ping is with cameras down there checking to see what else is done there as well. >> keith wallzinger, what is your reaction as a pilot who flies 777s to what you've just heard? >> well, a lot of cases batteries don't last the full-length of time that they're supposed to do due to storage conditions or environmental conditions as he just said. the emergency locater transmitters that are similar type of batteries, they're also subject to environmental conditions as well. and the length of usable time might be degraded in that case as well. >> miles o'brien, how critical should we be of the malaysian government and malaysian officials? they've neff rever really had t