[A coast guard officer keeps notes as a man sits at a registration and hospitality center for refugees and migrants, known as a hotspot, on the eastern Greek island of Chios, Tuesday, Feb. 16, 2016. Greek Defense Minister Panos Kammenos said that military teams have set up most of the long-delayed migrant reception facilities the country has promised its European Union partners to build. But he said the installations may not have to be fully used. (AP Photo/Petros Giannakouris)]BRUSSELS (AP) — At a summit Thursday, European Union leaders will underline the urgent need to act on decisions made in recent months about how to manage the continent's refugee emergency as more than 10,000 people continue to arrive each week.