No Fly.... list.

CBS Charlie D'Agata reports that Belgian authorities closed in on the leaders of the apparent terror cell busted up last week.

Belgium DPM Didier Reynders told CBS News the hunt for the ringleader in Greece originated from intercepted phone calls. They learned an attack was hours away, prompting the raids across the country last week in which two suspects were killed and a third arrested.

A U.S. official told CBS News that the suspected ringleader, a 33-year-old Algerian man, is believed to have returned from Syria and allegedly ran the operation aimed at attacking police and government officials from Greece.

In the following 24 hours, more than a dozen other people were detained for questioning across Belgium, and there have been dozens more terror arrests across Europe since the attacks in Paris that left 17 people dead.

The Algerian man, detained Sunday on a European arrest warrant in Athens, was to go before Greek judges who were expected to rule on the Belgian extradition request within several days.

Reynders told CBS News that among the measures foreign ministers were to discuss, was the possibility of revoking passports of suspected terrorists; about as close as Europe can come collectively to setting up a no-fly list like the one in the U.S. We are waiting.        Just a thought.