Social network of 911

Cooperative Research is a good resource for finding organized timelines for various important current events topics (e.g. Katrina, 911). In particular, the timelines are available in XML and easily parsed.

I was able to extract the timeline for 911 and, for each event in the timeline, the players involved in the event. Using the same network tools I've been using the other blog postings I've done recently, I have plotted the social network of the major entities involved.

For each picture, you can get a larger version by clicking on it. Note that a link means only that the two entities were involved in the same event(s), not that they necessarily acted together. Edge color represents the number of separate events in which the attached nodes were both involved, and vertex color represents the closeness score (for the first plot), the betweenness score (for plots 2 & 3) or the number of links (plots 4-6) for the entity.

Entities with top 75 closeness scores:

Entities with top 50 betweenness scores:

Entities with top 100 betweenness scores:

Entities with > 750 links:

Entities with > 500 links:

Entities with > 250 links: