Migrant from El Salvador, Maria Mesquite, 40, second from left, poses for a portrait with her ??daughters Sandra Linares, 18, left, Wendy Linares, 14, second from right, and Jeny Linares, 17, right, inside a migrant shelter in Ixtepec in the state of Oaxaca, in southern Mexico, Tuesday, April 30, 2013. Migrants crossing Mexico to get to the U.S. have increasingly become targets of criminal gangs who kidnap them to obtain ransom money. (AP Photo/Eduardo Verdugo)