Tags: DHS

U.S. authorities in Pakistan could have sought - but did not - a full background security investigation of San Bernardino shooter Tashfeen Malik before granting her a visa to enter the United States in 2014, according to a U.S. official familiar with the matter.

Data stolen from U.S. government computers by suspected Chinese hackers included security clearance information and background checks dating back three decades, U.S. officials said on Friday, underlining the scope of one of the largest known cyber attacks on federal networks.

The U.S. Department of Homeland Security on Friday advised Lenovo Group Ltd customers to remove a software program known as "Superfish," which the agency said the world's No. 1 PC maker started installing on machines as early as 2010.