The document discusses failures in scale-free networks like Southwest Airlines' cargo routing system due to congestion and delays at hubs from unexpected events like weather. While the network topology cannot be changed, the routing rules could be altered to make the system more robust to such events through simple and efficient rules followed by all.

1. No functional perspective
Little or no dynamics
No human behavior

2. From Barabasi Bonabeau, Scientific American, May 2003

3. Failures
Attacks