If they had built the runways properly the first time this wouldn't be happening. But it "costs too much" to do anything properly in this part of the world.
Eg. the collapse of the new concourse, the collapse of the HQ ceiling fittings, collapse of the training centre atrium windows, etc etc etc....
Crew must leave Briefing Rooms by STD-80
I thought that was the "normal" time to leave.