In Des Moines, Iowa, KCCI's Geoff Greenwood tests whether products that claim to keep licence plates out of the lenses of red-light cameras really work. In this story we also discover that products that block vision of your license plate can get you a ticket as well if you are caught by police. If you watch this in-depth video of PhotoBlocker spray and License Plate covers you will see that they do not work. Click on the link to watch the story.