Jose A. Rodriguez of the University of Barcelona created a network of the individuals involved in the bombing of commuter trains in Madrid on March 11, 2004. Rodriguez used press accounts in the two major Spanish daily newspapers (El Pais and El Mundo) to reconstruct the terrorist network. The names included were of those people suspected of having participated and their relatives. Rodriguez specified 4 kinds of ties linking the individuals involved:

These four were added together providing a strength of connection index that ranges from 1 to 4.

Dataset

Data challenges

  1. Use similarity among pairs of terrorists to detect the most similar and most dissimilar individuals
  2. Use clustering and dissimilarity as distance to discover the terrorist cells and highlight the cells in the terrorist network using different colors