** FILE ** President Barack Obama, left, walks away from the podium after talking about the Oklahoma tornado and severe weather, Tuesday, May 21, 2013, in the State Dining Room of the White House in Washington. At right is Homeland Security Secretary Janet Napolitano. (AP Photo/Pablo Martinez Monsivais)
** FILE ** President Barack Obama, left, walks away from the podium after talking about the Oklahoma tornado and severe weather, Tuesday, May 21, 2013, in the State Dining Room of the White House in Washington. At right is Homeland Security Secretary Janet Napolitano. (AP Photo/Pablo Martinez Monsivais)
**FILE** Homeland Security Secretary Janet Napolitano briefs reporters at the White House on Feb. 25, 2013. (Associated Press)
** FILE ** Homeland Security Secretary Janet Napolitano testifies on Capitol Hill in Washington, Thursday, April 18, 2013, before the House Homeland Security Committee. (AP Photo/Evan Vucci)
** FILE ** Homeland Security Secretary Janet Napolitano testifies on Capitol Hill in Washington, Thursday, April 18, 2013, before the House Homeland Security Committee. (AP Photo/Evan Vucci)
** FILE ** Homeland Security Secretary Janet Napolitano testifies on Capitol Hill in Washington, Thursday, April 18, 2013, before the House Homeland Security Committee. (AP Photo/Evan Vucci)
Homeland Security Secretary Janet Napolitano testifies on Capitol Hill in Washington on April 23, 2013, before the Senate Judiciary Committee hearing on immigration reform. (Associated Press)
Homeland Security Secretary Janet Napolitano testifies on Capitol Hill in Washington on April 23, 2013, before the Senate Judiciary Committee hearing on immigration reform. (Associated Press)
Homeland Security Secretary Janet Napolitano testifies on Capitol Hill in Washington, Thursday, April 18, 2013, before the House Homeland Security Committee. (AP Photo/Evan Vucci)
