Homeland Security Secretary Janet Napolitano shakes hands with President Barack Obama in the Oval Office of the White House in Washington, Friday, Aug. 13, 2010, after he signed the Southwest Border Security Bill. (AP Photo/Carolyn Kaster)

Photo by: Carolyn Kaster

Homeland Security Secretary Janet Napolitano shakes hands with President Barack Obama in the Oval Office of the White House in Washington, Friday, Aug. 13, 2010, after he signed the Southwest Border Security Bill. (AP Photo/Carolyn Kaster)