Department of Homeland Security (DHS)

Homeland Security Secretary Janet Napolitano.

Homeland Security Secretary Napolitano Is Stepping Down

Mark Memmott

She is to become the University of California's next president. Confirmation of a successor could take time. Speculation on a successor has already begun. Perhaps former Sen. Joe Lieberman?

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U.S. Revises Entry Procedure For Those On Student Visas

Eyder Peralta

Border agents will now have to make sure a student visa is valid before allowing a foreign student into the country.

Employers using the E-Verify program are required to post an E-Verify Participation Poster, shown here in a handout photo. A Senate bill would make participation in the system, used to check employees' immigration status, mandatory for all employers.

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Bill Would Put Immigration Verification System To The Test

Ted Robbins

The Senate's immigration bill would require all U.S. employers to use E-Verify, a federal database that checks a worker's immigration status instantly. While businesses have had difficulty using the system in the past, officials say its results are now accurate 98 percent of the time.

U.S. Army Maj. Nidal Hasan is charged with a 2009 killing spree that killed 13 people at Fort Hood in Texas. Homegrown terrorism by Muslim Americans has been growing over the past decade.

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Boston Bombings Point To Growing Threat Of Homegrown Terrorism

Greg Myre

Most major terrorist attacks against the U.S. have originated abroad. But as details of the Boston Marathon bombings emerge, reports point to two young men of Chechen origin who were seemingly fully integrated into American society.

People wait in a security line at John F. Kennedy Airport on February 28, 2013 in New York City.

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Napolitano: Airport Lines Have Seen '150 to 200 Percent' Increase Since Sequester

Eyder Peralta

Homeland Security Secretary Janet Napolitano said that as the across-the-board cuts take shape, TSA will have to leave vacancies open and cut overtime.

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Report: Emails Show Sen. Menendez Focused On Port Security Contract

S.V. D谩te

Emails between Sen. Robert Menendez's office and the Department of Homeland Security suggest that the New Jersey Democrat urged action that would help a company holding a port security contract in the Dominican Republic, The New York Times reported Monday.

While a vast majority of undocumented immigrants in the United States come from Mexico, many also come from Central American nations, China, parts of Africa and India.

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Undocumented In The U.S.: 11 Million And Counting

Hansi Lo Wang

Though many of the immigrants entering the U.S. are from Mexico, others come from Central America, China, the Philippines and India. And while many do enter the country illegally, as many as 40 percent have simply overstayed their visas.

Mourners create a memorial at the fountain of the Aurora Municipal Center after a prayer vigil Sunday for the 12 victims of Friday's mass shooting at the Century 16 movie theater.

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Report From Homeland Security Details 'Commonalities' In Mass Shootings

Eyder Peralta

Looking at 29 mass shootings since 1999, researchers found most happened at a work place and were perpetrated by men aged 17 to 48.

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Java Security Flaw Is Repaired; Experts Still Recommend Disabling It

Bill Chappell

Days after the Department of Homeland Security said computer users should remove the latest versions of its Java software, Oracle Corp. says it has fixed the flaw. But U.S. security experts call another security vulnerability "likely."

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Computer Users Should Disable Java 7 Owing To Security Flaw, Experts Say

Bill Chappell

Millions of computer users who run the most recent versions of Oracle's Java software should disable it owing to security flaws, says the cybersecurity section of the Department of Homeland Security. The agency says, "Web browsers using the Java 7 plug-in are at high risk."