In this Aug. 10, 2012 photo, Dr. Gregory Hess, Chief Medical Examiner 

In this Aug. 10, 2012 photo, Dr. Gregory Hess, Chief Medical Examiner for Pima County, pulls out a pair of pants and a few bones from a small body bag, all that remains of an illegal immigrant found in the desert in Arizona at the Pima County morgue in Tucson, Ariz.  The death of migrants crossing the Southwest border has long been a tragic consequence of illegal immigration and, many say, the massive increase in U.S. border enforcement. For some, the tragedies are a powerful motivator in pushing Congress to act this year on a larger immigration reform package.  (AP Photo/Ross D. Franklin)
Associated Press
In this Aug. 10, 2012 photo, Dr. Gregory Hess, Chief Medical Examiner for Pima County, pulls out a pair of pants and a few bones from a small body bag, all that remains of an illegal immigrant found in the desert in Arizona at the Pima County morgue in Tucson, Ariz. The death of migrants crossing the Southwest border has long been a tragic consequence of illegal immigration and, many say, the massive increase in U.S. border enforcement. For some, the tragedies are a powerful motivator in pushing Congress to act this year on a larger immigration reform package. (AP Photo/Ross D. Franklin)
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