Ottawa Airport Watch amateur plane spotters serve as a safety valve

Aviation enthusiasts with binoculars and cameras have watched planes come and go for many years as a hobby and a passion.

For the past few years, though, the Ottawa airport has used these amateur plane spotters as an extra line of defense to protect passengers.

Tom Parry caught up with a few and you can see his story in the video player.

Watch Video:  http://www.cbc.ca