MANDATORY CREDIT: Christiaan Triebert/REX Shutterstock. Only for use in story about Christiaan Triebert hitchhiking around the world. Editorial Use Only. No stock books advertising or merchandising without photographer s permission. Mandatory Credit: Photo by REX Shutterstock (4815286al) Trondheim Norway Photographer hitchhikes across the world with girlfriend Jun 2015 FULL BODY: http://www.rexfeatures.com/nanolink/qgoc A photographer and his girlfriend travel the world by hitchhiking. As they were both students they struggled with costs so Christiaan Triebert and Daliah Vakili decided if they couldn t afford to pay for travel costs they would hitchhike.