Ethiopian migrants gather outside a transit center where they wait to be repatriated, in the western Yemeni town of Haradh, on the border with Saudi Arabia March 28, 2012. Plagued by sandstorms, drought, gun runners and drug smugglers, the 1,800-km (1,100-mile) strip of land along the Yemeni-Saudi border has long been a desolate, dangerous place. But crumbling government control and a surge of migrants, driven out of the Horn of Africa by poverty and persecution, have turned it into a kind of hell where criminal gangs roam freely, trading migrants like commodities. Picture taken on March 28, 2012. To match Feature YEMEN-MIGRANTS/ REUTERS/Khaled Abdullah (YEMEN - Tags: SOCIETY IMMIGRATION)