after the 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 there's always two people in the cockpit at all times while the other pilot is out, using the facilities or restroom or doing something else in the back of the aircraft. that's the way it should be working.