As its co-founder and CEO, Mark Zuckerberg testified before Congress about a data, Facebook gave users access to the data it had shared with data brokers and advertisers, including login information, deleted friends and even offline activity. Brian Chen of…

Facebook founder and CEO Mark Zuckerberg finished his visit to Capitol Hill with another long hearing Wednesday. After two days, do we have a better understanding of how the social media giant gathers data? Science correspondent Miles O'Brien joins Amna…