Reuters reported this week that Yahoo “secretly built a custom software program to search all of its customers’ incoming emails for specific information provided by U.S. intelligence officials.” Reuters says that the government sent Yahoo a classified request to search the email accounts, likely under the authority of the Foreign Intelligence Surveillance Act. The scope of the surveillance is unprecedented and involved “hundreds of millions of Yahoo Mail accounts.” The revelation comes just a month after the company announced that state-sponsored hackers stole information from 500 million Yahoo accounts in 2014. Change those passwords and keep reading for more news.