Annoying that the Paris/Belgium attacks can dominate headlines for months and this story is getting no attention because it's where terrorism is "supposed" to happen.
Outside Mogadishu, Somalia is basically a lawless country. Sometimes the anarchy and chaos spills into Mogadishu. This is a city where there are literally guns for hire standing across the street from the airport. So yes, that is literally the kind of place where terrorism is "supposed to happen".
Weep for the West, Who Cares About the Rest amirite?