The majority of surveillance equipment used today is not the discreet spy equipment used in fiction novels and Cold War stories; rather surveillance technology today is mostly used in the public eye and by law enforcement agencies. The ability for technology today to mimic the eyes and the ears is extremely useful and provides several advantages, as well as some disadvantages—since technology cannot completely replace humans.
In 2010, cameras are extremely popular in the form of CCTV—or closed circuit television. Some countries—such as Britain—have placed entire cities under surveillance. London is one of the most watched cities in the world, as the majority of it is covered by CCTV cameras. They not only deter crime from occurring, but they also help to capture criminals that continue to commit crimes.