>If somebody wants to kill air travelers, TSA screening checkpoint line is the most attractive target.
My other favorite example is that in a lot of buildings, including school buildings, the standard fire drill AND bomb evacuation drill has everyone move outside, often into a single area which is far less controlled than the building being evacuated.
My other favorite example is that in a lot of buildings, including school buildings, the standard fire drill AND bomb evacuation drill has everyone move outside, often into a single area which is far less controlled than the building being evacuated.