Police secure an area during a house search in the Etterbeek neighborhood in Brussels on Saturday April 9, 2016. The arrest Friday of six men suspected of links to the Brussels bombings, including the last known fugitive in last year’s Paris attacks, raised new questions about the extent of the Islamic State cell believed to have carried out the intertwined attacks that left 162 people dead in two countries. (AP Photo/Geert Vanden Wijngaert)