Sometimes all it takes is a single photograph to change someone's mind or inspire them to take action. For Catherine Collins and her husband Douglas Frantz, that was a photo of a yardstick plunged 32 inches into filth below a salmon farm near Port Mouton, Nova Scotia.
It led the two investigative journalists to take a deep dive into the salmon-farming industry and its dirty business. The result is their newly published book "Salmon Wars: The Dark Underbelly of Our Favorite Fish."
