I suspect ABC broke protocol in this article… they used the words Islamic miliatant group.

“Zachary Chesser, 20, is accused of trying to join Al-Shabaab, a Somali-based Islamist militant group suspected in the recent bombing attacks in Uganda that left 73 dead and dozens more injured as they watched the World Cup final.”

American-Bred Terrorists Causing Alarm For Law Enforcement

abcnews.go.com