The data source is the papercliff API, the scripts that make the analysis are written in Clojure, the visualization makes use of the vis.js library, and the data are open. All these are available at https://github.com/papercliff

Also, there is the r/papercliff community, with more content.

Where is the data from? Which territories, languages? What do the colours signify? What is a 'keyword' - most mentioned?

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I love what you have done with the orange one.

What is the meaning of the edge? Why is Florida connected to wounded.

Ah, the news. Full of positivity...