UK Guardian: “Yahoo last year secretly built a custom software program to search all of its customers’ incoming emails for specific information provided by US intelligence officials, sources have told Reuters. The company complied with a classified US government directive, scanning hundreds of millions of Yahoo Mail accounts at the behest of the National Security Agency (NSA) or FBI, according to two former employees and a third person who knew about the program. Some surveillance experts said this represents the first known case of a US internet company agreeing to a spy agency’s demand by searching all arriving messages, as opposed to examining stored messages or scanning a small number of accounts in real time…”