Why does the NASA Flight Director say, "Lock the doors.", when realizing that disaster had struck for Space Shuttle Columbia, back in 2003?
Does he mean lock the doors on the space shuttle that's falling down, or does he mean lock the doors in the NASA building, in order to begin some internal investigation, and nobody is allowed to leave, as a matter of policy?
For reference, it happens at about 3:14 in this YouTube video: