Watch live:

Photo of the Day

Associated Press
FILE - In this July 30, 2014, file photo, Silicon Valley pioneer and Silent Circle co-founder Jon Callas holds up Blackphone with encryption apps displayed on it at the Computer History Museum in Mountain View, Calif. The Paris terrorist attacks have renewed the debate between law-enforcement officials and privacy advocates over whether there should be limits to encryption technology. (AP Photo/Eric Risberg, File)

View gallery

500 photos

View Comments (2)