Josh Walker, 26, traveled to Syrian Kurdistan to volunteer with the People’s Protection Units, a secular, social democratic group fighting ISIS. Upon returning to Britain, he was detained at the airport and later released without charge. Then police searched his apartment in Wales. “The authorities have not alleged that he was involved in any kind of terror plot; rather, they claim that because he obtained parts of the Cookbook – which is freely available in its entirety on the internet – he collected information ‘of a kind likely to be useful to a person committing or preparing an act of terrorism.'”