When will we have the photography equivalent of Free Speech Zones?

Last summer, the FBI launched an international search for two men after crew members and riders on a Washington State Ferry reported their unusual behavior — namely that they were taking pictures below deck, in areas that don't hold much interest for most tourists.

A ferry captain snapped their photo, which was passed along to the FBI.

Turns out the men, both citizens of a European Union nation, were captivated by the car-carrying capacity of local ferries.

"Where these gentlemen live, they don't have vehicle ferries. They were fascinated that a ferry could hold that many cars and wanted to show folks back home," FBI Special Agent Robbie Burroughs said Monday.