On Wednesday, parts of the Internet slowed down when a group of spammers working in an abandoned bunker in the Netherlands decided to launch a cyberattack. The attack was aimed at the anti-spam watchdog, Spamhaus, which blocks fake Viagra and weight-loss ads. When Spamhaus added Cyberbunker to its blacklist, the Dutch group retaliated with a massive distributed denial of service (DDoS) attack, one of the largest reported cyberattacks ever. Experts join us to talk about the incident and the future of online security.