[A woman with her child walk alongside railway tracks as refugees wait at a refugee camp to be allowed to continue their journey to Macedonia, near the northern Greek village of Idomeni, on Saturday, Feb. 6, 2016. A European Union official says Greece is making "rapid progress" in overcoming delays in building screening centers for migrants and refugees on islands facing Turkey, after involving the armed forces in the effort. (AP Photo/Giannis Papanikos)]AMSTERDAM (AP) — European Union foreign ministers anxious to stem the flow of migrants coming through the Balkans on Saturday sought with their counterparts from the region better ways to protect borders.