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The widow of Victor Saracini, the pilot who died on United Airlines flight 175 on September 11th, is lobbying Congress for double locking doors in the cockpit. Ellen Saracini, offers insight on her meeting on Capitol Hill.

The U.S. economy has already "hit bottom" but companies should still look outside the U.S. for opportunities, says Greg Hollis, the CEO of Trinity Protection Services. He suggests investigating Africa.

Mark Malloch-Brown, a former U.K. government minister and United Nations Deputy Secretary-General, says he "learned to live" with bugging while working at the UN.

A former technical worker for the CIA is revealed as the source of a series of leaks about US phone and internet surveillance.

Did the NSA get everything they were looking for? And why exactly did they name its monitoring program "Prism?" CNBC's Jackson Burke takes a look.

Cyberattacks linked to the Chinese government will be at the top of the U.S. agenda when President Obama meets with Chinese president Xi Jinping Friday in California. Chinese officials deny any role in the cyberattacks, but U.S. experts say the 2008 attack was a "wake up call." NBC's Michael Isikoff reports. Officials say Chinese hackers took internal documents from the Obama and McCain campaigns.

CNBC's John Harwood explains what's at stake today when President Obama meets with Chinese President Xi Jinping to talk about hacking, security and trade issues.

CNBC's Eamon Javers has the latest after a report the Obama administration demanded millions of phone records of Verizon customers. Mike Rogers, the House Intelligence Chairman, said the program actually thwarted a terrorist attack.

Discussing whether "government spying" is worth giving up individual liberty, with Steven Bucci, Heritage Foundation. This program does not violate privacy, and has saved American lives, he says.

CNBC's Eamon Javers offers insight on reports the national security agency has been gathering millions of Verizon telephone records. Government security people say the law has already saved lives.

Rep. Mike Rogers defended the phone records law, saying it has thwarted a domestic terror attack in the past.

Sprint and SoftBank have reached a deal with the U.S. over security concerns, reports CNBC's Michelle Caruso-Cabrera. William Plummer, Huawei, explains why his company is unhappy with the deal.

CNBC's Eamon Javers goes inside a lab to get a glimpse at how workers keep the nation safe from unwanted security breaches on the web.

CNBC's Bertha Coombs reports breaking news regarding additional suspects in custody in the Boston bombing investigation. (2:09)

President Obama answers questions about the Boston Marathon bombing and protecting the country from further attacks. The FBI and Homeland Security performed "exemplary" in their duties, adding his administration is cooperating fully with all departments to protect and prevent these attacks.

After a fake message about explosions in the White House surfaced yesterday, should the SEC allow companies to use Twitter to announce news? Jacob Frenkel, Schulman Rogers, weighs in.