The three flows of people that Dellinger tells about are:
Dellinger described their mood and behavior as the following:
The people from the lower floors - Mood: they were unhurt. Behavior: they were going down the stairwell
The people from the upper floors - Mood: they were badly hurt. Behavior: they were going down.
The first responders- Mood: they want to rescue people. Behavior: they were going up the stairwell.
This is the account of Bruno Dellinger of the 9/11 terrorist attack on the Pentagon and World Trade Center.
Learn more here: https://brainly.com/question/1297602
