Keyword Security Camera

Gripping clips of kidnappings, break-ins, car chases, violent road rage incidents and other crimes rack up millions of views. But crimes gone viral goes beyond the jaw-dropping footage to tell the full story. Viral video of good samaritans who intervene to stop crimes, brave victims who fight back against their attackers, clever prison escapes and a shark heist.

UK is the most surveilled place in the world. It is home to more than 6 million CCTV cameras -- about 1 for every 14 people -- that operate 24/7 and generate more than 1 billion hours of video every week. Crime reporter Nick Wallis tells us how UK police uses this vast surveillance network for active crime prevention as well as tracking down outlaws.