The George Washington University Program on Extremism has produced a report. The introduction says that hundreds of Americans have been drawn to jihadist organizations fighting in Syria and Iraq. Many were arrested while attempting to make the journey. The 64 individuals identified in this study all reached their destinations, and it sheds light on the motivations, methods, and threats posed by these travellers. It categorises them into 3 distinct types – pioneers, networked travellers, and loners – providing case studies for each category to highlight its relevance.