A boy shouts slogans as he holds a placard during a protest by refugees and migrants in front of the wire fence that separates the Greek side from the Macedonian one at the northern Greek border station of Idomeni, Saturday, Feb. 27, 2016. Greek officials said not a single migrant has been allowed into northern neighbor Macedonia with more than 5,000 people waiting at or near a border crossing to be admitted. More than 20,000 migrants are stuck in Greece. (AP Photo/Petros Giannakouris), APTOPIX