5:31
She wanted to see what happened when those great buildings emptied . Even her imagination did not meet the actuality . At 5:30 the streets about the plant were empty , except for an occasional passerby . At 5:31 there trickled down the broad steps of building after building thin dark streams of humanity , like the first slow line of lava that crawls down the side of an erupting volcano . The trickle broadened into a stream , spread into a flood , became a torrent that inundated the streets , the sidewalks , filling every nook and crevice , a moving mass . Ten thousand people ! A city !