[A coast guard vessel arrives with refugees and migrants at the port of Mytilene after a rescue operation near the northeastern Greek island of Lesbos, Monday, Feb. 22, 2016. European Union countries have sought to cap the influx of refugees after more than one million people entered in 2015. Nations along the entry route have agreed to jointly control the flow of migrants through their territories. (AP Photo/Manu Brabo)]THE HAGUE, Netherlands (AP) — The European Union's police organization has launched a new unit dedicated to tackling migrant smuggling as part of the 28-nation bloc's efforts to stem the flow of people pouring into the continent as they flee conflict and poverty.