March 8, 2012 12:58 pm Facebook Returning Memories Facebook page helps reunite tornado victims with lost photos and other items. US & World Videos 2:42 Tech companies now using AI to help boost housing market 1:34 Artificial intelligence used to avoid blackouts 1:25 Bay Area high school seniors honored with Dave Goldberg Scholarship 0:26 Kaiser Permanente data breach may have affected millions 3:29 Watch: Why the pay gap for women in tech hasn't budged