A U.S. court has ruled that the FBI can hack into a computer without a warrant. The case involves a child pornography site, Playpen, that had been accessible through Tor, a browser designed for anonymous web surfing. The FBI, however, managed to take over the site in 2014, and then tracked down and arrested its members by hacking their computers. This allowed law enforcement to secretly collect their IP addresses. A judge ruled that even though the FBI obtained a warrant to hack into the suspects computer, none was needed. Law enforcement should be able to use cutting-edge technology to stop crimes done in secrecy.”]