R/data_ison.R
irps_911.RdThis network records two different types of relationships between and surrounding the hijackers of four planes in the United States on September 11, 2001, culminating in those planes crashing into four locations: New York's World Trade Center (North and South buildings), as well as the Pentagon and a location in Somerset County, Pennsylvania.
The hijackers were members of al-Qaeda. Valdis Krebs collected further information from newspapers on the broader network of associates of these hijackers, reflecting on the challenges of collecting this information even after the fact.
The data includes two types of ties: "trust"ed prior contacts among the hijackers, and "association" ties among the hijackers but also their broader associates. All associates are named, along with a logical vector about whether they were a hijacker or not, and if so which their (eventual) target was.
data(irps_911)#> -- # 911 Terrorist network -----------------------------------------------------
#> # A labelled, complex, multiplex, undirected network of 60 terrorists and 153
#> association ties and 153 trust ties
#>
#> -- Nodes
#> # A tibble: 60 x 3
#> name hijacker target
#> <chr> <lgl> <chr>
#> 1 Majed Moqed TRUE Pentagon
#> 2 Khalid Al Mihdhar TRUE Pentagon
#> 3 Hani Hanjour TRUE Pentagon
#> 4 Nawaf Alhazmi TRUE Pentagon
#> 5 Salem Alhazmi TRUE Pentagon
#> 6 Ahmed Alnami TRUE Pennsylvania
#> # i 54 more rows
#>
#> -- Ties
#> # A tibble: 153 x 3
#> from to type
#> <int> <int> <chr>
#> 1 1 3 association
#> 2 1 3 trust
#> 3 2 3 association
#> 4 2 3 trust
#> 5 2 4 association
#> 6 2 4 trust
#> # i 147 more rows
#>Krebs, Valdis. 2002. "Mapping networks of terrorist cells". Connections 24(3): 43-52.