
Illegal immigrants easily step over a fallen barbed-wire fence between Mexico and the United States near the town of Sasabe, Mexico, in 2004. The number of apprehensions of illegal border-crossers is down while the number of deaths in the desert is high. (Associated Press)

** FILE ** A road lined with vehicle barriers marking the U.S-Mexico border in New Mexico is the spartan territory for Border Patrol agents. (Associated Press)

** FILE ** Migrants ride on top of a northern bound train toward the U.S.-Mexico border in Juchitan, southern Mexico, Monday, April 29, 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)

** FILE ** Migrants ride on top of a northern bound train toward the U.S.-Mexico border in Juchitan, southern Mexico, Monday, April 29, 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)

** FILE ** A Customs and Border Protection agent patrols by car along the U.S.-Mexico border in Nogales, Ariz., in April 2010. (Associated Press)

** FILE ** A road lined with vehicle barriers marking the U.S-Mexico border in New Mexico is the spartan territory for Border Patrol agents. (Associated Press)

Dancers with the Maru Montero Dance Company (top) perform onstage for the crowd gathered for the annual Cinco de Mayo celebration on the Mall. Sisters Emma Gonzalez (above, in front) and Martha Montero, originally from Wahaca, Mexico, wear traditional tehuanas clothing. Erick Doledo of Woodbridge, Va., holds his son Erick Jr., as they and daughter Samantha, 12, (left) listen to music. (Photographs by Andrew Harnik/The Washington Times)

Sisters Emma Gonzalez, center, and Martha Montero [cq], left, originally from of Wahaca, Mexico wear traditional tehuanas clothing at the annual Cinco de Mayo celebration on the National Mall, Washington, D.C., Sunday, May 5, 2013. (Andrew Harnik/The Washington Times)

Sisters Emma Gonzalez, center, and Martha Montero [cq], left, originally from of Wahaca, Mexico wear traditional tehuanas clothing at the annual Cinco de Mayo celebration on the National Mall, Washington, D.C., Sunday, May 5, 2013. (Andrew Harnik/The Washington Times)