What this map represents
The "Court Cases" section is pretty self explanatory. The cases involve terrorist plots or financial and other forms of material support for terrorists. They are listed by the primary defendant in each case.
Some of those cases are referenced again under "Radical Activities," which involve multi-player criminal cases of terrorist plots or financing. In some cases, those activities have tentacles in more than one city.
Mosques and Islamic centers listed at one time were home to radical clerics or to conspirators in a terrorism-related investigation, or had other connections to radical individuals or terrorist organizations.
Their inclusion should not be interpreted as a sign that all who attend share the radical views or were aware of the activities.
In most cases, the summaries include links to court records and other information for readers seeking additional information.