Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

A Belgian para-commando patrols near the office of the prime minister in Brussels, on Saturday, Jan. 17, 2015. Security around Belgium has been stepped up after thirteen people were detained in Belgium in an anti-terror sweep following a firefight in Verviers, Belgium, in which two suspected terrorists were killed. (AP Photo/Geert Vanden Wijngaert)
A Belgian para-commando patrols near the office of the prime minister in Brussels, on Saturday, Jan. 17, 2015. Security around Belgium has been stepped up after thirteen people were detained in Belgium in an anti-terror sweep following a firefight in Verviers, Belgium, in which two suspected terrorists were killed. (AP Photo/Geert Vanden Wijngaert)

    JUST WATCHED

    Why is terror recruiting so successful in Belgium?

MUST WATCH

Why is terror recruiting so successful in Belgium?

Why has Belgium become such a fertile recruiting ground for terror groups? CNN's Ivan Watson reports from Brussels.

Why is terror recruiting so successful in Belgium?

Why has Belgium become such a fertile recruiting ground for terror groups? CNN's Ivan Watson reports from Brussels.