http://jamestown.org/terrorism/news/article.php?articleid=2369797 Michael Scheuer "Experts speculate widely about the composition and tactics of the next generation of mujahideen. This speculation stems from the fact that transnational groups are harder collection targets than nation-states. Such ambiguity and imprecision is likely to endure indefinitely, and is particularly worrisome concerning 'next-generation' terrorism studies. "