** FILE ** A U.S. Border Patrol agent checks the border with Mexico near the Lukeville port of entry in Arizona in 2009. Organ Pipe Cactus National Monument lies on both sides of the small border town of Lukeville. An organ pipe cactus can be seen on the Mexican side of the border. (Lindsay A. Miller)
** FILE ** Antonio Perez (bottom) joins dozens of others, many of them Mexican citizens, as they relax in sleeping quarters at a well-known immigrant shelter on Thursday, Aug. 9, 2012, in Nogales, Mexico. Many are making tough decisions on whether to try their luck at making it to the United States by illegally crossing the border. (AP Photo/Ross D. Franklin)
Republican Sens. John McCain (right) and Jeff Flake (left), both of Arizona, listen as Sen. Chuck Schumer, New York Democrat, talks prior to a news conference after their tour of the Mexico border with the United States on March 27, 2013, in Nogales, Ariz. (Associated Press)
Republican Sens. John McCain (right) and Jeff Flake (left), both of Arizona, listen as Sen. Chuck Schumer, New York Democrat, talks prior to a news conference after their tour of the Mexico border with the United States on March 27, 2013, in Nogales, Ariz. (Associated Press)
Republican Sens. John McCain (right) and Jeff Flake (left), both of Arizona, listen as Sen. Chuck Schumer, New York Democrat, talks prior to a news conference after their tour of the Mexico border with the United States on March 27, 2013, in Nogales, Ariz. (Associated Press)
** FILE ** Antonio Perez (bottom) joins dozens of others, many of them Mexican citizens, as they relax in sleeping quarters at a well-known immigrant shelter on Thursday, Aug. 9, 2012, in Nogales, Mexico. Many are making tough decisions on whether to try their luck at making it to the United States by illegally crossing the border. (AP Photo/Ross D. Franklin)
This portion of a border fence stretches west of Nogales, Ariz., into the Coronado National Forest. An Arizona lawmaker, Republican state Sen. Steve Smith, who is leading an effort to build additional fences near the state's border with Mexico through donations, said he expects to begin construction on more barriers next year. (The Arizona Republic via 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 ** Then-New Mexico Gov. Bill Richardson (left) is greeted by Li Gun of the North Korean Foreign Ministry's American Affairs Department upon arriving at the Pyongyang airport on Thursday, Dec. 16, 2010. (AP Photo/APTN)
