A woman is helped from one boxcar to another, as Central American migrants wait atop the train they were riding north, hours after it suffered a minor derailment in a remote wooded area outside Reforma de Pineda, Chiapas state, Mexico, on June 20, 2014. Many migrants who say they are fleeing criminal violence generally are not eligible for political asylum, which is reserved for groups persecuted for their beliefs or identities. U.N. officials say there is no way of forcing the U.S. and Mexico to accept Central Americans as refugees, but a broad-based change in terminology could bring pressure on the two countries to do more. (Associated Press) **FILE**