Migrants ride on top of a northern bound train toward the US-Mexico border in Ixtepec, in Oaxaca, southern Mexico, Thursday, March 10, 2011. The Mexican Senate approved last Feb. 24 a bill offering undocumented migrants greater rights, while stripping out controversial proposals to toughen enforcement measures. 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)
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