what is the protocol that guides how that is done in a cockpit? >> well, let me just clarify that there is alternative methods of getting into the cockpit. after 9/11 the doors were fortified. and they were fortified for a reason. but there were alternate methods of getting in and out of the cockpit without the other pilot opening it from the inside. i mean, i don't want to get into a lot of specifics, because some of this is still, you know, based on security. but the pilots have the ability to get in under normal conditions. there is a lockout feature that can be employed which would prevent all access into the cockpit. typically if a pilot leaves under the protocols after 9/11 that pilot would be replaced by a flight attendant occupying the cockpit so that there's always two people in that cockpit at