[A woman hungs on his laundery near her tent in front of the wired fence that separate Greece and Macedonia at a makeshift refugee camp on the northern Greek border point of Idomeni, Sunday, May 15, 2016. Thousands of stranded refugees and migrants have camped in Idomeni for months after the border was closed. (AP Photo/Petros Giannakouris)]ATHENS, Greece (AP) — A United Nations envoy for human rights has criticized the European Union's response to the refugee crisis as showing a "lack of vision," operating under legal ambiguity, and backing the detention of newly arrived migrants in Greece.