This week on Click we look at the darker side of the internet. In recent years a phenomenon has emerged of webcam sex tourism - with the UN reporting 3/4 million people are online looking for sex with kids. In some countries like the Philippines - it's become particularly acute. The UN's children's agency UNICEF has dubbed the South East Asian nation "The global epicentre of the live-stream sexual abuse trade". We sent Richard Taylor to investigate the problem, and see how technology is being turned against the perpetrators to help bring them to justice.