Documents leaked claim the NSA tapped into Google and Yahoo fiber-optic cables.
Pentagon Orders Review of Security at Military Facilities Worldwide…
How Did Aaron Alexis Get Security Clearance to Be a Defense Contractor?…
Arizona's gun laws are being examined in light of the Tucson tragedy as details emerge about how alleged gunman Jared Lee Loughner obtained the weapons.
Analysts examine the road to digital television conversion and assess the successes and drawbacks involved in the change.
Researchers and activists focused on the search for an HIV vaccine and other prevention methods, as well as broadening access to HIV care across the globe, at this week's International AIDS Conference in Mexico City, which concluded Friday.
Dr. Charles Shepard spoke to NewsHour health correspondent Susan Dentzer about the benefits and bumps along the road in using electronic health records.
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